Although Ebola isn't a threat to Americans now, President Barack Obama said in an interview that aired Sunday that it could become one if the U.S. fails to help prevent its spread in Africa.
The virus has killed a suspected 1,800 people in West Africa, according to the Centers for Disease Control. No confirmed cases have been reported in the U.S., but three Americans who were infected in Africa have been brought back to the U.S. for treatment.
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Obama told NBC's "Meet the Press" host Chuck Todd that the U.S. needs to send military assets to set up isolation units and equipment to help contain the spread of Ebola. He said it will still take "months" before the problem is controlled.
"If we don't make that effort now and this spreads, not just through Africa but other parts of the world, there's the prospect then that the virus mutates, it becomes more easily transmittable, and then it could be a serious danger to the United States," the president said.
The U.S. has pledged funds for health workers and supplies, but the United Nations and aid groups have urged countries to get more involved.
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Before You Go
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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Liberia security forces patrol in the West Point area, as the government clamps down on the movement of people to prevent the spread of the Ebola virus in Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
ASSOCIATED PRESS
Liberia security forces blockade an area around the West Point Ebola center as the government clamps down on the movement of people to prevent the spread of the Ebola virus in the city of Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
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ASSOCIATED PRESS
Liberian security officers dressed in riot gear, right, control a crowed of people in the West Point area, as the government clamps down on the movement of people to prevent the spread of the Ebola virus in Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
ASSOCIATED PRESS
Liberia security forces, blockade an area around the West Point Ebola center as the government clamps down on the movement of people to prevent the spread of the Ebola virus in city Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
ASSOCIATED PRESS
Liberia security forces in riot gear, blockade an area near the West Point Ebola center as the government clamps down on the movement of people to prevent the spread of the Ebola virus in the city of Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents.(AP Photo/Abbas Dulleh)
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John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberian riot policemen enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Family members of West Point district commissioner Miata Flowers flee the slum while being escorted by the Ebola Task Force on August 20, 2014 in Monrovia, Liberia. The military was called in to extract the commissioner and her family members from the seaside slum after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The military also began enforcing a quarrantine on West Point, a congested slum of 75,000, fearing a spread of the epidemic. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Local residents protest as Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The government ordered the quarantine of West Point, a congested seaside town of 75,000, on Wednesday, in an effort to stop the spread of the virus in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for allowing a holding center for suspected Ebola patients to be set up in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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ASSOCIATED PRESS
People gather as Liberian security forces walk past in the West Point area, as the government clamps down on the movement of people to prevent the spread of the Ebola virus in Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
ASSOCIATED PRESS
Liberia security forces dressed in riot gear, left, control a crowd of people in the West Point area, as the government clamps down on the movement of people to prevent the spread of the Ebola virus in Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
ASSOCIATED PRESS
A Liberian security officer patrols in the West Point area, as the government clamps down on the movement of people to prevent the spread of the Ebola virus in Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
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ASSOCIATED PRESS
Liberian soldiers patrol in the West Point area as the government clamps down on the movement of people to prevent the spread of the Ebola virus in Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents. (AP Photo/Abbas Dulleh)
ASSOCIATED PRESS
Residents from an area close to the West Point Ebola center, protest as they are not allowed to enter the area leading to their homes, after Liberia security forces blocked roads, as the government clamps down on the movement of people to prevent the spread of the Ebola virus in the city of Monrovia, Liberia, Wednesday, Aug. 20, 2014. Security forces deployed Wednesday to enforce a quarantine around a slum in the Liberian capital, stepping up the governmentâs fight to stop the spread of Ebola and unnerving residents.(AP Photo/Abbas Dulleh)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberia's police chief Clanence Massaquoi (3L) speaks to residents of the West Point slum on August 20, 2014 in Monrovia, Liberia. A quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Residents watch as Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Residents watch as Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The quarantine of West Point, a congested favella of 75,000 people, began Wednesday, as the government tries to stop the spread of the virus in the capital city. A mob overran and closed an Ebola isolation ward there on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The government ordered the quarantine of West Point, a congested seaside town of 75,000, on Wednesday, in an effort to stop the spread of the virus in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for allowing a holding center for suspected Ebola patients to be set up in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Members of Liberia's Ebola Task Force ride in the back of a pickup as they enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)
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John Moore via Getty Images
MONROVIA, LIBERIA - AUGUST 20: Local residents protest as Liberia's Ebola Task Force enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia. The military began enforcing a quarantine on West Point, a congested favela of 75,000, fearing a spread of the Ebola epidemic in the capital city. Liberian soldiers were also sent in to extract West Point Commissioner Miata Flowers and her family members after residents blamed the government for setting up a holding center for suspected Ebola patients in their community. A mob overran and closed the facility on August 16. The Ebola virus has killed more than 1,200 people in four African nations, more in Liberia than any other country. (Photo by John Moore/Getty Images)