Effectiveness of Ebola travel ban questioned

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Effectiveness of Ebola travel ban questioned
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) - A ban on travel from West Africa might seem like a simple and smart response to the frightening Ebola outbreak there. It's become a central demand of Republicans on Capitol Hill and some Democrats, and is popular with the public. But health experts are nearly unanimous in saying it's a bad idea that could backfire.

The experts' key objection is that a travel ban could prevent needed medical supplies, food and health care workers from reaching Liberia, Sierra Leone and Guinea, the nations where the epidemic is at its worst. Without that aid, the deadly virus might spread to wider areas of Africa, making it even more of a threat to the U.S. and the world, experts say.

In addition, preventing people from the affected countries from traveling to the U.S. could be difficult to enforce and might generate counterproductive results, such as people lying about their travel history or attempting to evade screening.

The U.S. has not instituted a travel ban in response to a disease outbreak in recent history. The experts insist now is not the time to start, especially given that the disease is still extremely contained in the U.S. and the only people who have caught it here are two health care workers who cared for a sick patient who later died.

"If we know anything in global health it's that you can't wrap a whole region in cellophane and expect to keep out a rapidly moving infectious disease. It doesn't work that way," said Lawrence Gostin, a professor and global health expert at Georgetown University Law Center. "Ultimately people will flee one way or another, and the more infection there is and the more people there are, the more they flee and the more unsafe we are."

Officials with the Centers for Disease Control and Prevention and the National Institutes of Health voiced similar objections at a congressional hearing this past week. So did President Barack Obama after meeting with administration officials coordinating the response.

Obama said he didn't have a "philosophical objection" to a travel ban but that he was told by experts that it would be less effective than the steps the administration has instituted, including temperature screening and monitoring at the five airports accounting for 94 percent of the arrivals from the three impacted nations. There are 100 to 150 arrivals daily to the U.S. from that region.

"Trying to seal off an entire region of the world - if that were even possible - could actually make the situation worse," Obama said Saturday in his weekly radio and Internet address.

Still, with little more than two weeks from midterm elections and control of the Senate at stake, the administration is facing mounting pressure on Capitol Hill to impose travel restrictions. Numerous Republicans have demanded a ban, as have a handful of Democrats, including at least two endangered incumbent senators, Kay Hagan of North Carolina and Mark Pryor of Arkansas.

House Speaker John Boehner, R-Ohio, also favors a travel ban, and his spokesman, Kevin Smith, said the speaker hasn't ruled out bringing the House back into session to address the Ebola issue. Obama "has the authority to put a travel ban into effect right now," Smith said.

Lawmakers have proposed banning all visitors from Liberia, Sierra Leone and Guinea, or at least temporarily denying visas to nationals of those countries. They've suggested quarantining U.S. citizens arriving here from those nations for at least 21 days, Ebola's incubation period, and limiting travel to West Africa to essential personnel and workers ferrying supplies.

Related steps that have been proposed by Pryor and others include strengthening existing quarantine centers, getting health officials to assist with screenings at airports and ensuring that information collected at airports on travelers from hot zones is shared with state officials.

Experts say some of those limited steps make sense but question the legality, ethics and effectiveness of large-scale quarantines. Although it would be theoretically possible to get supplies and medical personnel to West Africa even while shutting down commercial air travel, in practice it would turn into a logistical nightmare, they say. They cite expenses and difficulties in chartering private aircraft or enlisting the military's assistance to transport thousands of personnel and huge amounts of supplies from around the world that is now moving freely on scheduled air travel.

Screening measures now in place allow arrivals from West Africa to be tracked; if those people go underground, attempt to enter via the Southern Border or by other means, it becomes that much harder to keep tabs on them.

Another difficulty arises because there are no direct flights to the U.S. from the impacted nations, raising the question of where to draw the line. Should flights from Paris, Amsterdam, London or Munich be banned if it turns out there is a passenger from Monrovia, Liberia, on them? Or should the other passengers just be screened? What if Ebola breaks out on European soil - should the travel ban be extended?

Among the travel ban skeptics is former President George W. Bush's top health official, who coordinated the government's response to bird flu in 2005 and 2006. At the time, it was feared that the H5N1 flu strain, capable of jumping from birds to humans, could become the catalyst for a global pandemic.

A travel ban "is intuitively attractive, and seems so simple," said Mike Leavitt, who led the Health and Human Services Department from 2005-2009. "We studied it intensely in preparation for H5N1. I became persuaded that there are lots of problems with it."

___

Associated Press writers Charles Babington, Ricardo Alonso-Zaldivar and Jim Kuhnhenn contributed to this report.

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