US steps up domestic response to Ebola crisis

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US steps up domestic response to Ebola crisis
DALLAS, TX - OCTOBER 15: Emergency vehicles escort an ambulance on the tarmac at Love Field Airport October 15, 2014. The ambulance had reportedly delivered Amber Vinson, a health care worker, to an air ambulance. According to reports, Vinson, had contracted the Ebola virus and had taken a commercial Frontier Airlines flight from Cleveland, Ohio to Dallas, Texas, a day before become symptomatic. (Photo by Stewart F. House/Getty Images)
Amber Vinson, 29, the Dallas nurse who was being treated for Ebola, speaks at a news conference after being discharged from Emory University Hospital, Tuesday, Oct. 28, 2014, in Atlanta. Vinson worked as a nurse at Texas Health Presbyterian Hospital Dallas and cared for Thomas Eric Duncan, a Liberian man who died of Ebola at the hospital on Oct. 8. Vinson was one of two nurses who became infected while caring for Duncan. (AP Photo/David Goldman)
Amber Vinson, 29, the Dallas nurse who was being treated for Ebola, right, smiles as Emory University Hospital epidemiologist Dr. Bruce Ribner speaks during a press conference after Vinson was discharged from the hospital, Tuesday, Oct. 28, 2014, in Atlanta. Vinson worked as a nurse at Texas Health Presbyterian Hospital Dallas and cared for Thomas Eric Duncan, a Liberian man who died of Ebola at the hospital on Oct. 8. Vinson was one of two nurses who became infected while caring for Duncan. (AP Photo/David Goldman)
Amber Vinson, 29, the Dallas nurse who was being treated for Ebola, right, embraces Emory University Hospital epidemiologist Dr. Bruce Ribner, as she leaves a press conference after being discharged from the hospital, Tuesday, Oct. 28, 2014, in Atlanta. Vinson worked as a nurse at Texas Health Presbyterian Hospital Dallas and cared for Thomas Eric Duncan, a Liberian man who died of Ebola at the hospital on Oct. 8. Vinson was one of two nurses who became infected while caring for Duncan. (AP Photo/David Goldman)
Amber Vinson, 29, the Dallas nurse who was being treated for Ebola, rear, looks on as Emory University Hospital epidemiologist Dr. Bruce Ribner speaks during a news conference after Vinson was discharged from the hospital, Tuesday, Oct. 28, 2014, in Atlanta. Vinson worked as a nurse at Texas Health Presbyterian Hospital Dallas and cared for Thomas Eric Duncan, a Liberian man who died of Ebola at the hospital on Oct. 8. Vinson was one of two nurses who became infected while caring for Duncan. (AP Photo/David Goldman)
Amber Vinson, 29, the Dallas nurse who was being treated for Ebola, speaks at a news conference as members of her nursing staff look on after being discharged from Emory University Hospital, Tuesday, Oct. 28, 2014, in Atlanta. Vinson worked as a nurse at Texas Health Presbyterian Hospital Dallas and cared for Thomas Eric Duncan, a Liberian man who died of Ebola at the hospital on Oct. 8. Vinson was one of two nurses who became infected while caring for Duncan. (AP Photo/David Goldman)
Amber Joy Vinson, 2nd Dallas nurse with Ebola, traveled to Ohio to visit family, plan wedding http://t.co/AfQQEcnh4h http://t.co/YP5oI0j9Iv
Amber Vinson, 29, the Dallas nurse who was being treated for Ebola, right, embraces Dr. Aneesh Mehta, Emory University Hospital Assistant Director of Transplant Infectious Disease, as she leaves a news conference after being discharged from the hospital, Tuesday, Oct. 28, 2014, in Atlanta. Vinson worked as a nurse at Texas Health Presbyterian Hospital Dallas and cared for Thomas Eric Duncan, a Liberian man who died of Ebola at the hospital on Oct. 8. Vinson was one of two nurses who became infected while caring for Duncan. (AP Photo/David Goldman)
A sign points to the entrance to the emergency room at Texas Health Presbyterian Hospital Dallas, where U.S. Ebola patient Thomas Eric Duncan was being treated, Wednesday, Oct. 8, 2014, in Dallas. The hospital said Wednesday that Duncan has died. (AP Photo/LM Otero)
Onlookers wait to see a convoy carrying nurse Nina Pham after she arrived at Frederick Municipal Airport, Thursday, Oct. 16, 2014, in Frederick, Md. Pham, a nurse at Texas Health Presbyterian Hospital in Dallas, was diagnosed with the Ebola virus after caring for Thomas Eric Duncan before he died of the same virus. She will be transported to the National Institutes of Health in Bethesda, Md. (AP Photo/Patrick Semansky)
WASHINGTON, DC - OCTOBER 17: Paige Victoria, 23, of Cleveland, Ohio, and Jeff Hulbert of Annapolis, Maryland, (obscured in back) hold up signs in front of the White House on October 17, 2014 in Washington, D.C. Hulbert is protesting the entry of Ebola into the country through air travel. 'There should be a temporary travel ban on visitors from infected regions until medical infrastructure can get up to speed,' said Hulbert. (Photo by Allison Shelley/Getty Images)
Jeff Hulbert from Annapolis, Maryland, dressed in a protective suit and mask holds a poster demanding for a halt of all flights from West Africa,as he protests outside the White House in Washington, DC on October 16, 2014. Top US health officials faced a grilling Thursday by lawmakers infuriated over the nation's fumbling response to the Ebola outbreak, as the Obama administration scrambles to contain the disease's spread. Centers for Disease Control (CDC) director Thomas Frieden has become the most prominent target of the criticism, which has mounted as it emerged that a second Texas health care worker infected with the deadly disease was allowed to board a commercial flight despite reporting a low-grade fever. AFP PHOTO/MLADEN ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)
Twilette Miller, a nurse arriving from Dayton, Ohio, and concerned about Ebola reports, wears a precautionary surgical mask at Dulles International Airport October 16, 2014, in Sterling, Virginia, outside Washington, DC. Some schools in Ohio and Texas closed Thursday amid fears that students or staff had been exposed to a nurse who had Ebola infection during an airline flight. The US Centers for Disease Control has reached out to 132 people who were on the same October 13 flight as Amber Vinson, but said there was an extremely low risk that anyone was infected. AFP PHOTO/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
DALLAS, TX - OCTOBER 15: An air ambulance carrying Amber Vinson takes off from Love Field Airport October 15, 2014. According to reports, Vinson, a healthcare worker, had contracted the Ebola virus and had taken a commercial Frontier Airlines flight from Cleveland, Ohio to Dallas, Texas, a day before become symptomatic. (Photo by Stewart F. House/Getty Images)
WASHINGTON, DC - OCTOBER 16: White House Press Secretary Josh Earnest takes questions from the media during his daily briefing in the Brady Briefing Room, October 16, 2014 in Washington, DC. Secretary Earnest spoke about the two health care workers who were infected with the Ebola virus in Texas. (Photo by Mark Wilson/Getty Images)
Texas Health Presbyterian Hospital Dallas staff line the drive that exits the emergency room as they wait for an ambulance carrying Nina Pham to depart, Thursday, Oct. 16, 2014, in Dallas. Pham, a nurse at the hospital was diagnosed with the Ebola virus after caring for Thomas Eric Duncan who died of the same virus. Amber Vinson, another nurse diagnosed, was taken to a similar location in Atlanta yesterday. (AP Photo/Tony Gutierrez)
This Oct. 13, 2014, photo released via Twitter by the City of Dallas Public Information Managing Director Sana Syed shows Bentley in Dallas, the one-year-old King Charles Spaniel belonging to Nina Pham, the nurse who contracted Ebola. Bentley has been taken from Pham's Dallas apartment and will be cared for at an undisclosed location. (AP Photo/Courtesy of Sana Syed/PIO, City of Dallas)
This 2010 photo provided by tcu360.com, the yearbook of Texas Christian University, shows Nina Pham, 26, who became the first person to contract the disease within the United States. Records show that Pham and other health care workers wore protective gear, including gowns, gloves, masks and face shields and sometimes full-body suits when caring for Thomas Eric Duncan. (AP Photo/Courtesy of tcu360.com)
An ambulance carrying Amber Joy Vinson, the second health care worker to be diagnosed with Ebola in Texas, arrives at Emory University Hospital on Wednesday, Oct. 15, 2014, in Atlanta. Vinson was one of the nurses who cared for Thomas Eric Duncan, who died at the Dallas hospital last week of the Ebola virus. (AP Photo/David Tulis)
The Frontier Airlines plane that Amber Vinson flew from Cleveland to Dallas on Monday, taxies away from the terminal at Cleveland Hopkins International Airport Wednesday, Oct. 15, 2014, in Cleveland. Vinson is the second nurse to be diagnosed with Ebola at the Texas Health Presbyterian Hospital in Dallas. Ohio health officials aren't sure how many people came into contact with Vinson as she visited family in the Akron area days before being diagnosed with the disease. (AP Photo/Tony Dejak)

Nina Pham (Instagram)

President Barack Obama pauses as he speaks about Ebola during a meeting in the Cabinet Room of the White House in Washington, Wednesday, Oct. 15, 2014, with members of his team coordinating the government’s response to the Ebola outbreak. (AP Photo/Jacquelyn Martin)
DALLAS, TX - OCTOBER 12: A man dressed in protective hazmat clothing walks towards an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
Twilette Miller, a nurse arriving from Dayton, Ohio, and concerned about Ebola reports, wears a precautionary surgical mask at Dulles International Airport October 16, 2014, in Sterling, Virginia, outside Washington, DC. Some schools in Ohio and Texas closed Thursday amid fears that students or staff had been exposed to a nurse who had Ebola infection during an airline flight. The US Centers for Disease Control has reached out to 132 people who were on the same October 13 flight as Amber Vinson, but said there was an extremely low risk that anyone was infected. AFP PHOTO/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
The cruise ship Carnival Magic passes near Cozumel , Mexico, Friday, Oct. 17, 2014. The cruise ship with a Dallas health care worker aboard who is being monitored for signs of Ebola did not receive clearance to dock in Cozumel, a day after Belize refused to let the passenger leave the vessel. (AP Photo/Angel Castellanos)
Passengers at Frontier gate at Hopkins now wearing masks http://t.co/kBn0hhZhQZ
President Barack Obama, next to Secretary of Defense Chuck Hagel, speaks to the media about Ebola during a meeting in the Cabinet Room of the White House in Washington, Wednesday, Oct. 15, 2014, with members of his team coordinating the government’s response to the Ebola outbreak. (AP Photo/Jacquelyn Martin)
President Barack Obama, second from left, speaks to the media about Ebola during a meeting in the Cabinet Room of the White House in Washington, Wednesday, Oct. 15, 2014, with members of his team coordinating the government’s response to the Ebola outbreak including, from left are Health and Human Services Secretary Sylvia Burwell, Secretary of Defense Chuck Hagel, Homeland Security Secretary Jeh Johnson, National Security Adviser Susan Rice, and Commerce Secretary Penny Pritzker. (AP Photo/Jacquelyn Martin)
President Barack Obama speaks about Ebola after a meeting in the Cabinet Room of the White House in Washington, Wednesday, Oct. 15, 2014, with members of his team coordinating the government’s response to the Ebola outbreak. (AP Photo/Jacquelyn Martin)
This is Amber Vinson, the #ebola patient that flew from #CLE to #Texas after visiting #Akron http://t.co/wBoZM9Hvr1 http://t.co/RGSvcA6l3Q
Family confirms, #Dallas nurse Nina Pham is 2nd patient with #Ebola... #PrayersforNina http://t.co/dTXi5SPZVW http://t.co/u4slPTn6US
#NinaPham identified as Dallas nurse with #Ebola http://t.co/3p3AFlxp42 http://t.co/L4Ho8zSHuM
Dr. Tom Frieden, head of the Centers for Disease Control and Prevention, speaks at a news conference, Sunday Oct. 12, 2014, in Atlanta. A Texas health care worker, who was in full protective gear when providing hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition. (AP Photo/John Amis)
DALLAS, TX - OCTOBER 12: Workers with hazmat company CG Environmental Cleaning Guys prepare a tarp to block the view of media as they prepare to enter an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A man dressed in protective hazmat clothing leaves after treating the front porch and sidewalk of an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
A hazmat worker cleans outside the apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
DALLAS, TX - OCTOBER 12: No trespassing signs and warning tape mark the apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
A woman looks out of her window from an apartment building next door to the apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/Roger Steinman)
Dallas Mayor Mike Rawlings speaks to residents on the street of the apartment of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/Roger Steinman)
DALLAS, TX - OCTOBER 12: Dallas police setup a barrier after a hazmat vehicle entered the alley behind the apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A man dressed in protective hazmat clothing walks towards an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A Dallas police officer sets up a barrier after a hazmat vehicle entered the alley behind the apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A man dressed in protective hazmat clothing treats the front porch of an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Two workers with hazmat company CG Environmental Cleaning Guys stand in the alley behind an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A man dressed in protective hazmat clothing treats the sidewalk in front of an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A worker with hazmat company CG Environmental Cleaning Guys hangs a tarp blocking view of the apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Brad Smith with the hazmat company CG Environmental Cleaning Guys talks with the media outside of an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: G.C. Williford, Battalion Chief for the Dallas Fire Department, talks with fire department personell outside an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Police officers stand near a barrel containing waste material (L) that was removed from the apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Police officers stand outside an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Brad Smith with the hazmat company CG Environmental Cleaning Guys talks with the media outside of an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A Dallas police officer responds to media questions as hazmat company CG Environmental Cleaning Guys begins setup at the apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Brad Smith (C) with hazmat company CG Environmental Cleaning Guys directs an employee outside of the apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Volunteers pass out flyers for the Dallas County Health and Human Services department near an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
An informational flyer about Ebola from the Center for Disease Control is left of the front porch of a home Sunday, Oct. 12, 2014, in Dallas. A healthcare worker who lives on the street and who was caring for Ebola patient Thomas Eric Duncan, tested positive for the virus and is in stable condition, health officials said. If the preliminary diagnosis is confirmed, it would be the first known case of the disease being contracted or transmitted in the U.S. (AP Photo/Brandon Wade)
DALLAS, TX - OCTOBER 12: A barrel containing waste material that was removed from the apartment where a second person diagnosed with the Ebola virus resides sits on the lawn on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: G.C. Williford, Battalion Chief for the Dallas Fire Department, enters an apartment where a second person has been diagnosed with the Ebola virus on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A barrel containing waste material that was removed from the apartment where a second person diagnosed with the Ebola virus resides stis on the lawn on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: A woman passes out flyers for the Dallas County Health and Human Services department near an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
DALLAS, TX - OCTOBER 12: Volunteers pass out flyers for the Dallas County Health and Human Services department near an apartment where a second person diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
Police stand guard outside the apartment of a hospital worker and a yellow barrel, left, that holds hazardous materials, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
CORRECTS BYLINE - Police stand guard outside the apartment of a hospital worker and a yellow barrel, left, that holds hazardous materials, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
First responders guard the apartment of a healthcare worker Sunday, Oct. 12, 2014, in Dallas. The healthcare worker, who was caring for Ebola patient Thomas Eric Duncan, tested positive for the disease in preliminary tests. If the preliminary diagnosis is confirmed, it would be the first known case of the disease being contracted or transmitted in the U.S. (AP Photo/Brandon Wade)
A barrel labeled biohazard is left on the front lawn of a healthcare worker's apartment Sunday, Oct. 12, 2014, in Dallas, Texas. The healthcare worker, who was caring for Ebola patient Thomas Eric Duncan, tested positive for the disease in preliminary tests. If the preliminary diagnosis is confirmed, it would be the first known case of the disease being contracted or transmitted in the U.S. (AP Photo/Brandon Wade)
Police stand guard outside the apartment of a hospital worker and a yellow barrel, left, that holds hazardous materials, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A hazmat worker clean outside the apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A man who lives in the same apartment building as a hospital worker diagnosed with Ebola reacts to the media presence outside his home, Sunday, Oct. 12, 2014, in Dallas. The worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
Women ride bicycles past police standing guard outside the residence of a health care worker who tested positive for Ebola, Sunday, Oct. 12, 2014, in Dallas. The worker, who was caring for now deceased Ebola patient Thomas Eric Duncan, tested positive for the disease in preliminary tests. If the preliminary diagnosis is confirmed, it would be the first known case of the disease being contracted or transmitted in the U.S. (AP Photo/LM Otero)
A hazmat worker cleans outside the apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A women walks her dogs past the apartment of a hospital worker and a yellow barrel that holds hazardous materials, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A hazmat worker looks up while finishing up cleaning outside an apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A hazmat worker moves a barrel while finishing up cleaning outside an apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A hazmat worker points to the entrance of an apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A hazmat worker moves a barrel while cleaning outside an apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
A hazmat worker packs up a barrel while cleaning outside an apartment building of a hospital worker, Sunday, Oct. 12, 2014, in Dallas. The Texas health care worker, who was in full protective gear when they provided hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition, health officials said Sunday. (AP Photo/LM Otero)
DALLAS, TX - OCTOBER 12: A barrel labeled with biohazardous waste sits in front of an apartment where a second person has diagnosed with the Ebola virus resides on October 12, 2014 in Dallas, Texas. A female nurse working at Texas Heath Presbyterian Hospital, the same facility that treated Thomas Eric Duncan, has tested positive for the virus. (Photo by Mike Stone/Getty Images)
Texas Health Presbyterian Hospital Chief Clinical Officer Dr. Daniel Varga answers questions about a health care worker who provided hospital care for Thomas Eric Duncan who contracted Ebola, during a press conference at the hospital, Sunday, Oct. 12, 2014, in Dallas. Varga says the worker was in full protective gear when they provided care to Duncan during his second visit to Texas Health Presbyterian Hospital. (AP Photo/Brandon Wade)
Dr. Tom Frieden, head of the Centers for Disease Control and Prevention, speaks at a news conference, Sunday Oct. 12, 2014, in Atlanta. A Texas health care worker, who was in full protective gear when providing hospital care for Ebola patient Thomas Eric Duncan, who later died, has tested positive for the virus and is in stable condition. (AP Photo/John Amis)
Dallas Mayor Mike Rawlings speaks about a health care worker who contracted Ebola who was treating Thomas Eric Duncan during a press conference at the hospital, Sunday, Oct. 12, 2014, in Dallas, as Dallas County Judge Clay Jenkins, left, and Texas Health Presbyterian Hospital Chief Clinical Officer Dr. Daniel Varga,, look on. Varga, says the worker was in full protective gear when they provided care to Duncan during his second visit to Texas Health Presbyterian Hospital. (AP Photo/Brandon Wade)
Dallas Mayor Mike Rawlings, left, looks on as Dallas County Judge Clay Jenkins speaks about a health care worker who provided hospital care for Thomas Eric Duncan who contracted Ebola, during a press conference at the hospital, Sunday, Oct. 12, 2014, in Dallas. Dr. David Varga, of the Texas Health Resource, says the worker was in full protective gear when they provided care to Duncan during his second visit to Texas Health Presbyterian Hospital. (AP Photo/Brandon Wade)
Texas Health Presbyterian Hospital Chief Clinical Officer Dr. Daniel Varga answers questions about a health care worker who provided hospital care for Thomas Eric Duncan who contracted Ebola, during a press conference at the hospital, Sunday, Oct. 12, 2014, in Dallas. Varga says the worker was in full protective gear when they provided care to Duncan during his second visit to Texas Health Presbyterian Hospital. (AP Photo/Brandon Wade)
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WASHINGTON (AP) -- The federal government is ramping up its response to the Ebola crisis after a second Dallas nurse became ill and it was disclosed that she had been cleared to fly a day before her diagnosis.

While Ebola patients are not considered contagious until they have symptoms and only two persons have been known to contract the disease in the U.S., the revelations Wednesday raised new alarms about whether hospitals and the public health system are equipped to handle the deadly disease.

Federal health officials were being called to testify before a congressional committee Thursday to explain where things went wrong.

President Barack Obama directed his administration to respond in a "much more aggressive way" to oversee the Dallas cases and ensure the lessons learned there are transmitted to hospitals and clinics across the country. For the second day in a row he canceled out-of-town trips to stay in Washington and monitor the Ebola response.

Dr. Tom Frieden, director of the Centers for Disease Control and Prevention, said nurse Amber Joy Vinson never should have been allowed to fly on a commercial jetliner because she had been exposed to the virus while caring for an Ebola patient who traveled to the U.S. from Liberia.

Vinson was being monitored more closely since another nurse, Nina Pham, also involved in Thomas Eric Duncan's care was diagnosed with Ebola.

Obama Cancels Trip, Summons Cabinet on Ebola

Still, a CDC official cleared Vinson to board the Frontier Airlines flight from Cleveland to the Dallas area. Her reported temperature - 99.5 degrees - was below the threshold set by the agency and she had no symptoms, according to agency spokesman David Daigle.

Vinson was diagnosed with Ebola a day after the flight, news that sent airline stocks falling amid fears it could dissuade people from flying. Losses between 5 percent and 8 percent were recorded before shares recovered in afternoon trading.

Frontier has taken the aircraft out of service. The plane was flown Wednesday without passengers from Cleveland to Denver, where the airline said it will undergo a fourth cleaning, including replacement of seat covers, carpeting and air filters.

Customs and health officials at airports in Chicago, Atlanta, the Washington suburbs and Newark, New Jersey, were scheduled to start taking the temperatures of passengers from the three hardest-hit West African countries Thursday. The screenings, using no-touch thermometers, started Saturday at New York's Kennedy International Airport.

Even as the president sought to calm new fears about Ebola in the U.S., he cautioned against letting them overshadow the far more urgent crisis unfolding in West Africa, where Ebola has killed more than 4,000.

Underscoring his emphasis on international action, Obama called European leaders Wednesday to discuss better coordination in the fight against Ebola in the countries of Sierra Leone, Liberia and Guinea and to issue a call for more money and personnel to "to bend the curve of the epidemic." British Prime Minister David Cameron's office said he offered to consult with the Italians to add treatment beds in Sierra Leone.

On Thursday, Chinese President Xi Jinping pledged continued support for the fight against Ebola in West Africa, but made no specific new aid offers. China last month pledged $33 million in assistance to Liberia, Sierra Leone and Guinea and dispatched doctors and medical supplies.

And France said that on Saturday, it will begin screening passengers who arrive at Paris' Charles de Gaulle airport on the once-daily flight from Guinea's capital.

But it was Wednesday's development in Dallas that captured political and public attention in the United States.

Duncan, who traveled to the U.S. from Liberia, originally was sent home when he went to the Dallas hospital's emergency room, only to return much sicker two days later. He died of Ebola on Oct. 8.

Frieden has said breaches of protocols led to the infection of the two nurses. More than 70 other health care workers involved in Duncan's care were being monitored.

Republican lawmakers, including House Speaker John Boehner, increased calls for travel bans or visa suspensions from the West African countries where the disease has spread and urged the administration to take other measures to secure the transportation system.

The oversight subcommittee of the House Energy and Commerce Committee scheduled a Thursday hearing on Ebola with Frieden and Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases at the National Institutes of Health.

In prepared testimony, Fauci said Duncan's death and the infections of the two Dallas nurses and a nurse in Spain "intensify our concerns about this global health threat." He said two Ebola vaccine candidates were undergoing a first phase of human clinical testing this fall. But he cautioned that scientists were still in the early stages of understanding how Ebola infection can be treated and prevented.

Medical records provided to The Associated Press by Duncan's family showed Vinson inserted catheters, drew blood and dealt with Duncan's body fluids. Late Wednesday, she arrived in Atlanta to be treated at Emory University Hospital, which has already treated three Americans diagnosed with the virus.

Even though Vinson did not report having a fever until the day after she returned home, Frieden said she should not have boarded a commercial flight.

From now on, Frieden said, no one else involved in Duncan's care will be allowed to travel "other than in a controlled environment." He cited guidelines that permit charter flights or travel by car but no public transportation.

On its website, the CDC says all people possibly exposed to Ebola should restrict their travels - including by avoiding commercial flights - for 21 days.

Obama sought to ease fears in the U.S., urging a stepped-up response even as he stressed that the danger in the United States remained a long shot.

"We want a rapid response team, a SWAT team essentially, from the CDC to be on the ground as quickly as possible, hopefully within 24 hours, so that they are taking the local hospital step by step though what needs to be done," he said.

But he also noted that the Ebola is not an airborne virus like the flu and thus is more difficult to transmit.

He made the point of noting that when he visited with health care workers who had attended to Ebola patients at Emory University Hospital in Atlanta, he hugged and kissed them without fear of infection.

"They followed the protocols, they knew what they were doing," he said. "I felt perfectly safe doing so."

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NEW YORK, NY - OCTOBER 08: A member of Bellevue's Hospital staff wears protective clothing during a demonstration on how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: A member of Bellevue's Hospital staff wears protective clothing during a demonstration on how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: Bellevue Hospital is viewed following a news conference on how the facility would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: Members of Bellevue Hospital staff wear protective clothing as they demonstrate how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: Members of Bellevue Hospital staff wear protective clothing as they demonstrate how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: A member of Bellevue's Hospital staff wears protective clothing during a demonstration on how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: Members of Bellevue Hospital staff wear protective clothing as they demonstrate how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: Members of Bellevue Hospital staff wear protective clothing as they demonstrate how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: A member of Bellevue's Hospital staff wears protective clothing during a demonstration on how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: Members of Bellevue Hospital staff wear protective clothing as they demonstrate how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 08: Members of Bellevue Hospital staff wear protective clothing as they demonstrate how they would receive a suspected Ebola patient on October 8, 2014 in New York City. If the patient was confirmed to be carrying the deadly virus the person would be sent to an isolation unit for treatment. The first person diagnosed with Ebola in the United States, Liberian Thomas Duncan, has died at a Dallas hospital, Texas Health Presbyterian Hospital said. (Photo by Spencer Platt/Getty Images)
A member of the U.S army medical staff works in the newly constructed Ebola treatment centre in Bongcounty, on the outskirts of Monrovia, Liberia, Tuesday Oct. 7, 2014. Liberia has been among the hardest hit nations at the center of the long outbreak, which has killed more than 3,000 people. As of Friday, there had been 3,834 confirmed Ebola cases and 2,069 deaths in Liberia, according to the World Health Organization. Forty-four percent of those cases were reported in the past three weeks, a signal that the infectious disease is spreading. (AP Photo/Abbas Duller)
GBARNGA, LIBERIA - OCTOBER 07: U.S. Navy microbiologist Lt. Jimmy Regeimbal prepares to test blood samples for Ebola at the U.S. Navy mobile laboratory on October 5, 2014 near Gbarnga, Liberia. The U.S. now operates 4 mobile laboratories nationwide as part of the American response to the Ebola epidemic. The disease has killed more than 3,400 people in West Africa, according to the World Health Organization. (Photo by John Moore/Getty Images)
A licensed clinician sanitizes his hands after a simulated training session on Monday, Oct. 6, 2014, in Anniston, Ala. The Centers for Disease Control and Prevention (CDC) has developed an introductory training course for licensed clinicians. According to the CDC, the course is to ensure that clinicians intending to provide medical care to patients with Ebola have sufficient knowledge of the disease. (AP Photo/Brynn Anderson)
GBARNGA, LIBERIA - OCTOBER 07: U.S. Navy microbiologist Lt. Jimmy Regeimbal prepares to test blood samples for Ebola at the U.S. Navy mobile laboratory of on October 7, 2014 near Gbarnga in Bong County of central Liberia. The U.S. now operates 4 mobile laboratories in Liberia as part of the American response to the Ebola epidemic. The disease has killed more than 3,400 people in West Africa, according to the World Health Organization. (Photo by John Moore/Getty Images)
A volunteer in protective suit looks on after spraying disinfectant outside a home in Waterloo, some 30 kilometers southeast of Freetown, on October 7, 2014, prior to taking away from the house, with another volunteer, the body of a woman who died of Ebola. Dozens of British military personnel are due to fly to Sierra Leone next week to help build medical facilities to combat the Ebola epidemic, the defence ministry said on October 7. AFP PHOTO / FLORIAN PLAUCHEUR (Photo credit should read FLORIAN PLAUCHEUR/AFP/Getty Images)
Medical staff wearing protective clothing arrives at the apartment building of the Spanish nurse infected with Ebola in Madrid, Spain, Wednesday, Oct. 8, 2014. Officials said a nurse and a nursing assistant have been placed under observation for Ebola in a Madrid hospital where a colleague became infected after working with two Spanish missionary priests who contracted the disease in West Africa and later died at the center. (AP Photo/Andres Kudacki)
WUERZBURG, GERMANY - OCTOBER 07: A volunteer doctor who will travel to West Africa to help care for Ebola patients is disinfectet during training offered by the German Red Cross (DRK) on October 7, 2014 in Wuerzburg, Germany. Over 1,200 people across Germany have responded to a DRK call for volunteers, while the German armed forces, the Bundeswehr, has also asked for volunteers from its own ranks. Countries around the world are taking increasing precautions and committing resources in the battle against the deadly virus as the number of victims continues to climb. (Photo Timm Schamberger/Getty Images)
DALLAS, TX - OCTOBER 05: A member of the Cleaning Guys Haz Mat clean up company takes a barrel of items out of the apartment where Ebola patient Thomas Eric Duncan was staying before being admitted to a hospital on October 5, 2014 in Dallas, Texas. The first confirmed Ebola virus patient in the U.S. was staying with family members at the Ivy Apartments complex before being moved for treatment at Texas Health Presbyterian Hospital Dallas. State and local officials are working with federal officials to monitor other individuals that had contact with the confirmed patient. (Photo by Joe Raedle/Getty Images)
PAYNESVILLE, LIBERIA - OCTOBER 05: A Doctors Without Borders (MSF), health worker in protective clothing holds a child suspected of having Ebola in the MSF treatment center on October 5, 2014 in Paynesville, Liberia. The girl and her mother, showing symptoms of the deadly disease, were awaiting test results for the virus. The Ebola epidemic has killed more than 3,400 people in West Africa, according to the World Health Organization. (Photo by John Moore/Getty Images)
NEW YORK, NY - OCTOBER 09: Mary Moorer leads a class with workers from the union 32BJ, many of them airline cabin cleaners, terminal cleaners and wheelchair attendants, participate in a class on how to better protect themselves from infectious diseases in the wake of increased concerns around the Ebola virus on October 9, 2014 in New York City. The infectious disease training classes will be ongoing and teach members how to wear protective clothing and to safely handle potentially harmful body fluids they may come in contact with. It was announced on Wednesday that five airports across the United States will start screening passengers arriving from Ebola-affected countries in West Africa. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 09: Workers with the union 32BJ, many of them airline cabin cleaners, terminal cleaners and wheelchair attendants, participate in a class on how to better protect themselves from infectious diseases in the wake of increased concerns around the Ebola virus on October 9, 2014 in New York City. The infectious disease training classes will be ongoing and teach members how to wear protective clothing and to safely handle potentially harmful body fluids they may come in contact with. It was announced on Wednesday that five airports across the United States will start screening passengers arriving from Ebola-affected countries in West Africa. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 09: Workers with the union 32BJ, many of them airline cabin cleaners, terminal cleaners and wheelchair attendants, are handed protective gloves and a hand disinfectant as they participate in a class on how to better protect themselves from infectious diseases in the wake of increased concerns around the Ebola virus on October 9, 2014 in New York City. The infectious disease training classes will be ongoing and teach members how to wear protective clothing and to safely handle potentially harmful body fluids they may come in contact with. It was announced on Wednesday that five airports across the United States will start screening passengers arriving from Ebola-affected countries in West Africa. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - OCTOBER 09: Workers with the union 32BJ, many of them airline cabin cleaners, terminal cleaners and wheelchair attendants, participate in a class on how to better protect themselves from infectious diseases in the wake of increased concerns around the Ebola virus on October 9, 2014 in New York City. The infectious disease training classes will be ongoing and teach members how to wear protective clothing and to safely handle potentially harmful body fluids they may come in contact with. It was announced on Wednesday that five airports across the United States will start screening passengers arriving from Ebola-affected countries in West Africa. (Photo by Spencer Platt/Getty Images)
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