Questions and answers about the US Ebola case

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Questions and answers about the US Ebola case
In this picture taken Sunday, Sept. 28, 2014, Finda Saah, 28, holds six-week-old Prosper Junior, as 5 year old Alice and 13-year old son Augustin look on, at their St Paul Bridge home in Monrovia, Liberia. Finda lost her husband to the deadly Ebola virus and gave birth three days later. Ebola has killed more than 1800 people in Liberia this year. As the death toll from Ebola soars, crowded clinics are turning over beds as quickly as patients are dying. This leaves social workers and psychologists struggling to keep pace and notify families, who must wait outside for fear of contagion. Also, under a government decree, all Ebola victims must be cremated, leaving families in unbearable pain with no chance for goodbye, no body to bury. (AP Photo/Jerome Delay)
Medical practitioners shout against Spain's Prime Minister Mariano Rajoy during his visit to the Carlos III hospital in Madrid, Spain, Friday, Oct. 10, 2014. A Spanish hospital official says the nursing assistant infected with Ebola is "stable," hours after authorities described her condition as critical. She is the first person known to have caught the disease outside the outbreak zone in West Africa. She contracted the virus while helping treat a Spanish missionary who became infected in West Africa, and later died. (AP Photo/Daniel Ochoa de Olza)
Princess Duo, left, and Mamie Mangoe, right, both natively of Liberia who now live in Dallas, stand holding lit candles as they pray during a service at Wilshire Baptist Church that was dedicated to Thomas Eric Duncan, Wednesday, Oct. 8, 2014, in Dallas. Nearly 150 persons attended the service for Duncan who died Wednesday of complication from Ebola. (AP Photo/Tony Gutierrez)
Karsiah Duncan son of Ebola patient Thomas Eric Duncan listens during a news conference Tuesday, Oct. 7, 2014, in Dallas. "I'm just praying my dad will make it out safely," Karsiah said at the news conference hosted by a Dallas church. (AP Photo/Tim Sharp)
Karsiah Duncan, center, son of Ebola patient Thomas Eric Duncan speaks during a news conference while Dallas Mayor Mike Rawlings, left rear, and Saymendy Lloyd look on, Tuesday, Oct. 7, 2014, in Dallas. (AP Photo/Tim Sharp)
AP10ThingsToSee - Nowa Paye, 9, is taken to an ambulance after showing signs of the Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferers that had been quarantined by villagers. (AP Photo/Jerome Delay)
FILE - In this Thursday Oct. 2, 2014 file photo, Mercy Kennedy, 9, cries as community activists approach her outside her home on 72nd SKD Boulevard in Monrovia, Liberia, a day after her mother was taken away by an ambulance to an Ebola ward. Neighbors wailed Thursday upon learning that Mercy’s mother had died; she was among the cluster of cases that includes Thomas Eric Duncan, a Liberian man now hospitalized in Texas. On Thursday, little Mercy walked around in a daze in a torn nightgown and flip-flops, pulling up the fabric to wipe her tears as a group of workers from the neighborhood task force followed the sound of wailing through the thick grove of banana trees and corn plants. (AP Photo/Jerome Delay, File)
Stanley Williams, 3, and Tete Williams, 12, sister of Marthalene Williams, 19, the pregnant woman Thomas Eric Duncan helped when she became ill and who died of Ebola, walk in from of the group of flats where Duncan, a Liberian man now hospitalized in Texas, was a tenant on 72nd SKD Boulevard during his stay in Liberia, in Monrovia, Thursday, Oct. 2, 2014. Since the announcement of his illness, Duncan has become a symbol of how Ebola could spread within the United States. Here in Liberia, though, he is just another neighbor infected by a virulent Ebola cluster ravaging this neighborhood of tin-roof homes along 72nd SKD Boulevard.(AP Photo/Jerome Delay)
This 2011 photo provided by Wilmot Chayee shows Thomas Eric Duncan at a wedding in Ghana. In September 2014, Duncan became the first patient in the U.S. diagnosed with Ebola. He died in a Dallas hospital on Wednesday morning, October 8, 2014. (AP Photo/Wilmot Chayee)
A sign points to the emergency room at Texas Health Presbyterian Hospital where Thomas Eric Duncan, the Ebola patient who traveled from Liberia to Dallas, is being treated Saturday, Oct. 4, 2014, in Dallas. Duncan remains in isolation, where he was listed in critical condition Saturday. At the end of the week, Texas health officials said they had narrowed to about 50 the group of people they were monitoring who had some exposure to Duncan. (AP Photo/LM Otero)
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
DALLAS, TX - OCTOBER 04: Eric Williams (C) , a U.S. Congressional candidate, Steve Oriabure (L), from the Organization of Nigerian Nationals, and Shadiya Abdi speak to the media outside the Ivy Apartment complex where the confirmed Ebola virus patient was staying on October 4, 2014 in Dallas, Texas. They spoke to the media on their concerns about how the Ebola case is affecting the community. (Photo by Joe Raedle/Getty Images)
A young man retrieves food supplies and personal materials left by the North Texas Food Bank and the Red Cross on the front stoop of an apartment at The Ivy Apartments complex, Thursday, Oct. 2, 2014, in Dallas. Dallas County officials have ordered family members who had contact with the patient diagnosed with the Ebola virus to stay inside their home. (AP Photo/Tony Gutierrez)
Hazardous material cleaners prepare to hang black plastic outside the apartment in Dallas, Friday, Oct. 3, 2014, where Thomas Eric Duncan, the Ebola patient who traveled from Liberia to Dallas stayed last week. The family living there has been confined under armed guard while being monitored by health officials. (AP Photo/LM Otero)
Hazardous material cleaners prepare to hang black plastic outside the apartment in Dallas, Friday, Oct. 3, 2014, where Thomas Eric Duncan, the Ebola patient who traveled from Liberia to Dallas stayed last week. The family living there has been confined under armed guard while being monitored by health officials. (AP Photo/LM Otero)
Hazardous material cleaners arrives at the apartment complex in Dallas, Friday, Oct. 3, 2014, where Thomas Eric Duncan, the Ebola patient who traveled from Liberia to Dallas stayed last week. The crew is expected to remove items including towels and bed sheets used by Duncan, who is being treated at an isolation unit at a Dallas hospital. The family living there has been confined under armed guard while being monitored by health officials. (AP Photo/LM Otero)
Hazardous material cleaners arrives at the apartment complex in Dallas, Friday, Oct. 3, 2014, where Thomas Eric Duncan, the Ebola patient who traveled from Liberia to Dallas stayed last week. The crew is expected to remove items including towels and bed sheets used by Duncan, who is being treated at an isolation unit at a Dallas hospital. The family living there has been confined under armed guard while being monitored by health officials. (AP Photo/LM Otero)
A young man retrieves supplies left on the front stoop of an apartment where an Ebola infected man had stayed at The Ivy Apartments complex in Dallas, Friday, Oct. 3, 2014. Dallas city officials asked the family who resides at the apartment to remain in their home. (AP Photo/LM Otero)
A young man retrieves supplies left on the front stoop of an apartment where an Ebola infected man had stayed at The Ivy Apartments complex in Dallas, Friday, Oct. 3, 2014. Dallas city officials asked the family who resides at the apartment to remain in their home. (AP Photo/LM Otero)
A hazardous materials cleaning company truck sits parked outside The Ivy Apartments, Thursday, Oct. 2, 2014, in Dallas. Dallas city officials asked a family who resides at the complex who had contact with a man diagnosed with the Ebola virus to remain in their home. (AP Photo/Tony Gutierrez)
Mercy Kennedy, 9, cries Thursday Oct. 2, 2014. as community activists approach her outside her home on 72nd SKD Boulevard in Monrovia, Liberia, a day after her mother was taken away by an ambulance to an Ebola ward. Neighbors wailed Thursday upon learning that Mercy’s mother had died; she was among the cluster of cases that includes Thomas Eric Duncan, a Liberian man now hospitalized in Texas. On Thursday, little Mercy walked around in a daze in a torn nightgown and flip-flops, pulling up the fabric to wipe her tears as a group of workers from the neighborhood task force followed the sound of wailing through the thick grove of banana trees and corn plants.(AP Photo/Jerome Delay)
AP10ThingsToSee - Nowa Paye, 9, is taken to an ambulance after showing signs of the Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferers that had been quarantined by villagers. (AP Photo/Jerome Delay)
A man leaves a wheelbarrow containuing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus, follwed by her relatives at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
DALLAS, TX - OCTOBER 02: A woman delivers bottled water and toilet paper to residents in a unit at the Ivy Apartments, where the confirmed Ebola virus patient was staying, on October 2, 2014 in Dallas, Texas. The first confirmed Ebola virus patient in the United States was staying with family members at The Ivy Apartment complex before being treated 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 Tom Pennington/Getty Images)
Dallas County Health and Human Services Director Zachary Thompson and Christopher Perkins, D.O., M.P.H. Medical Director / Health Authority with DCHHS walk out of an apartment unit at The Ivy Apartment Complex, Thursday, Oct. 2, 2014, in Dallas. Dallas County officials have ordered family members who had contact with the patient diagnosed with the Ebola virus to stay inside their home. (AP Photo/Tony Gutierrez)
Thomas Duncan carries a woman HRS before she dies from #Ebola, then travels to TX. @CDCgov team now in Dallas. @AMHQ http://t.co/udwtA0eiGH
A young man retrieves food supplies and personal materials left by the North Texas Food Bank and the Red Cross on the front stoop of an apartment at The Ivy Apartments complex, Thursday, Oct. 2, 2014, in Dallas. Dallas County officials have ordered family members who had contact with the patient diagnosed with the Ebola virus to stay inside their home. (AP Photo/Tony Gutierrez)
Dallas County Health and Human Services Director Zachary Thompson stands outside of an apartment unit at The Ivy Apartment Complex after paying a visit, Thursday, Oct. 2, 2014, in Dallas. Dallas County officials have ordered family members who had contact with the patient diagnosed with the Ebola virus to stay inside their home. (AP Photo/Tony Gutierrez)
DALLAS, TX - OCTOBER 01: Texas Govenor Rick Perry answers questions related to the first confirmed case of the Ebola virus at Texas Health Presbyterian Hospital Dallas on October 1, 2014 in Dallas, Texas. State and local officials are working with federal officials to monitor other individuals that had contact with the confirmed patient. (Photo by Tom Pennington/Getty Images)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, answers questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
Yarkpawoto Paye, 84, is taken to an ambulance after showing signs of Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferers that had been quarantined by villagers. Aid donations are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest.(AP Photo/Jerome Delay)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
Nowa Paye, 9, is taken to an ambulance after showing signs of the Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia,Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferers that had been quarantined by villagers. Aid donations are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest. (AP Photo/Jerome Delay)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
Marie Nyan, 26, whose mother died of Ebola, carries her son Nathaniel Edward, 2, to an ambulance after showing signs of Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferers that had been quarantined. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest. (AP Photo/Jerome Delay)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
A woman being discharged from the Island Clinic Ebola treatment center in Monrovia, Liberia, is sprayed with disinfectant Tuesday Sept. 30, 2014. Six months into the world’s worst-ever Ebola outbreak, and the first to happen in an unprepared West Africa, the gap between what has been sent by other countries and private groups and what is desperately needed is huge. Even as countries try to marshal more resources to close the gap, those needs threaten to become much greater, and possibly even insurmountable. (AP Photo/Jerome Delay)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, answers questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: A medical transport van moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, explains the precautions taken to prevent the spread of the Ebola virus during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the disease on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, explains the precautions taken to prevent the spread of the Ebola virus during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the disease on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
Residents of the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, watch members of District 13 ambulance service disinfect a room as they pick up six suspected Ebola sufferers that had been quarantined, Tuesday Sept. 30, 2014. Six months into the world’s worst-ever Ebola outbreak, and the first to happen in an unprepared West Africa, the gap between what has been sent by other countries and private groups and what is desperately needed is huge. Even as countries try to marshal more resources to close the gap, those needs threaten to become much greater, and possibly even insurmountable. (AP Photo/Jerome Delay)
Mr. Kollis, center, who shows signs of possible Ebola infection, refuses to leave his home and board a District 13 ambulance dispatched to fetch him in Monrovia, Liberia, Tuesday Sept. 30, 2014. Unable to force patients into the ambulance, the crew left Mr. Kollis behind. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest.(AP Photo/Jerome Delay)
A District 13 ambulance rushes through traffic towards the Island Clinic Ebola treatment unit with six patients showing signs of Ebola infection from the village of Freeman Reserve in Monrovia, Liberia, Tuesday Sept. 30, 2014. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest. (AP Photo/Jerome Delay)
Residents of the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, watch members of District 13 ambulance service pickup six suspected Ebola sufferers that had been quarantined Tuesday Sept. 30, 2014. Aid donations are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest. (AP Photo/Jerome Delay)
In this picture taken Sunday, Sept. 28, 2014, Kumba "survivor" Fayiah, 11, sits with relatives in her St Paul Bridge home in Monrovia, Liberia. Fayah , who lost both parents and her sister, recovered from the Ebola virus and is now living with her extended family. As the death toll from Ebola soars, crowded clinics are turning over beds as quickly as patients are dying. This leaves social workers and psychologists struggling to keep pace and notify families, who must wait outside for fear of contagion. Also, under a government decree, all Ebola victims must be cremated, leaving families in unbearable pain with no chance for goodbye, no body to bury. (AP Photo/Jerome Delay)
Patients being discharged from the Island Clinic Ebola treatment center in Monrovia, Liberia, wait to be sprayed with disinfectant, Tuesday Sept. 30, 2014. Six months into the world’s worst-ever Ebola outbreak, and the first to happen in an unprepared West Africa, the gap between what has been sent by other countries and private groups and what is desperately needed is huge. Even as countries try to marshal more resources to close the gap, those needs threaten to become much greater, and possibly even insurmountable. (AP Photo/Jerome Delay)
Monrovia residents watch an ambulance carrying suspected Ebola sufferers rush to the Island Clinic Ebola treatment center in Monrovia, Liberia, Tuesday Sept. 30, 2014. Six months into the world’s worst-ever Ebola outbreak, and the first to happen in an unprepared West Africa, the gap between what has been sent by other countries and private groups and what is desperately needed is huge. Even as countries try to marshal more resources to close the gap, those needs threaten to become much greater, and possibly even insurmountable. (AP Photo/Jerome Delay)
A list showing the names of the day's deceased is taped on the door of the Island Clinic Ebola treatment unit in Monrovia, Liberia, Tuesday Sept. 30, 2014. Six months into the world’s worst-ever Ebola outbreak, and the first to happen in an unprepared West Africa, the gap between what has been sent by other countries and private groups and what is desperately needed is huge. Even as countries try to marshal more resources to close the gap, those needs threaten to become much greater, and possibly even insurmountable. (AP Photo/Jerome Delay)
Nowa Paye, 9, is taken to an ambulance after showing signs of Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferer that had been quarantined.Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest. (AP Photo/Jerome Delay)
Gordon Kamara, left, is sprayed by Konah Deno after they loaded six patients suspected to have been infected by the Ebola virus into their ambulance in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest.(AP Photo/Jerome Delay)
Monrovia residents beg a District 13 ambulance crew to take with them Mr. Kollis who shows signs of possible Ebola infection but refuses to leave his home in Monrovia, Liberia, Tuesday Sept. 30, 2014. Unable to force patients into the ambulance, the crew left Mr. Kollis behind. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest.(AP Photo/Jerome Delay)
A District 13 ambulance stops on the side of the road looking for suspected Ebola sufferers in Monrovia, Liberia, Tuesday Sept. 30, 2014. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest.(AP Photo/Jerome Delay)
Nowa Paye, 9, is taken to an ambulance after showing signs of Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Three members of District 13 ambulance service travelled to the village to pickup six suspected Ebola sufferers that had been quarantined Six months into the world’s worst-ever Ebola outbreak, and the first to happen in an unprepared West Africa, the gap between what has been sent by other countries and private groups and what is desperately needed is huge. Even as countries try to marshal more resources to close the gap, those needs threaten to become much greater, and possibly even insurmountable. (AP Photo/Jerome Delay)
Marie Nyan, 26, whose mother died of Ebola, gives water to her son Nathaniel Edward, 2, as they wait to be taken by an ambulance after showing signs of Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferers that had been quarantined. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest.(AP Photo/Jerome Delay)
Yarkpawoto Paye, 84, is taken to an ambulance after showing signs of Ebola infection in the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia,Tuesday Sept. 30, 2014. Three members of District 13 ambulance service traveled to the village to pickup six suspected Ebola sufferers that had been quarantined. Aid donations from western countries are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest.(AP Photo/Jerome Delay)
Residents of the village of Freeman Reserve, about 30 miles north of Monrovia, Liberia, watch members of District 13 ambulance service pickup six suspected Ebola sufferers that had been quarantined Tuesday Sept. 30, 2014. Aid donations are still inadequate, as the international community tries to increase the ability to care for the spiraling number of people infected with the disease which has hit Liberia the hardest. (AP Photo/Jerome Delay)
In this picture taken Sunday, Sept. 28, 2014, Julius Prout, 32, poses for a photograph in front of the St Paul Bridge community clinic where he works in Monrovia, Liberia. Falling victim to the Ebola virus after treating more than a dozen others infected, following a traditional funeral, Prout was wrongly declared dead, prompting family members to hold two wakes in his memory. A registered nurse, Prout stunned relative when he called them after recovering from the deadly disease. Prout is now back in his neighborhood, immune from Ebola and eager to help other victims. As the death toll from Ebola soars, crowded clinics are turning over beds as quickly as patients are dying. This leaves social workers and psychologists struggling to keep pace and notify families, who must wait outside for fear of contagion. Also, under a government decree, all Ebola victims must be cremated, leaving families in unbearable pain with no chance for goodbye, no body to bury. (AP Photo/Jerome Delay)
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BY LAURAN NEERGAARD

WASHINGTON (AP) -- U.S. health officials have warned for months that someone infected with Ebola could unknowingly carry the virus to this country, and there is word now that it has happened: A traveler in a Dallas hospital became the first patient diagnosed in the U.S.

Texas health officials said there were no other suspected cases in the state, and the Centers for Disease Control and Prevention immediately sought to calm fears that one case would spread widely.

"Ebola can be scary. But there's all the difference in the world between the U.S. and parts of Africa where Ebola is spreading," CDC Director Dr. Tom Frieden said, stressing that U.S. health workers know how to control the virus.

"There is no doubt in my mind that we will stop it here," he told a news conference in Atlanta on Tuesday.

Some questions and answers about the case:

Q: Where did the traveler come from?

A: Liberia, the hardest-hit country in the West African epidemic. The patient left on Sept. 19 and arrived in the U.S. on Sept. 20 to visit family. Frieden wouldn't release the man's nationality or other identifying information, and didn't know how he became infected.

Q: When did the patient get sick?

A: Last Wednesday, and he initially sought care two days later. He was released but returned Sunday when his condition worsened and Texas Health Presbyterian Hospital discovered the West Africa connection, admitting him under strict isolation. Tests confirmed Ebola on Tuesday.

Q: How does Ebola spread?

A: Only through close contact with the bodily fluids of someone who has symptoms, such as fever, vomiting and diarrhea. People aren't contagious until symptoms begin. And Ebola cannot spread through the air.

Q: So who's at risk?

A: Texas health officials already have begun tracking down those close contacts, believed to be mostly the relatives the man stayed with. Officials will check them for symptoms every day for 21 days. Frieden said only about a handful of people are believed to have been exposed.

Q: Could Ebola have spread on the airplane?

A: No, Frieden said, because the man wasn't sick then. The CDC said there is no need to monitor anyone else on those flights and didn't reveal flight information.

Q: Will the patient stay in Dallas?

A: Frieden said there's no need to transfer the man to one of those special isolation units that have gotten so much attention for treating four American aid workers who caught Ebola while volunteering in West Africa. Most hospitals can follow the necessary infection control for Ebola, Frieden said, and the Dallas hospital said it was "well prepared" to safely treat this newest case.

As for those other patients, three have recovered; the fourth remains hospitalized in Atlanta.

Q: How will this patient be treated?

A: Good hydration and IV nutrition have proven to be key for those other patients. Frieden said the hospital was discussing experimental treatments. A Tekmira Pharmaceuticals drug called TKM-Ebola and blood transfusions from an Ebola survivor were given to one of the recently infected U.S. aid workers.

Q: Could there be more travelers with Ebola?

A: No one's ruling it out. People boarding planes in the outbreak zone are checked for fever, but that does not guarantee that an infected person won't get through.

Airlines are required to report any deaths on a flight or ill travelers meeting certain criteria to the CDC before arriving in the U.S. If a traveler is infectious or exhibiting symptoms during or after a flight, the CDC will conduct an investigation of exposed travelers and take any necessary public health action.

Q: What if I'm worried about exposure?

A: Call the CDC for more information at 800-CDC-INFO (800-232-4636).

© 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

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