The two American aid workers who were the first patients to be successfully treated for Ebola in the United States were released Thursday, but the virus continues to spread along the West African coast. According to World Health Organization (WHO) spokesperson Gregory Hartl, bringing more personnel to the outbreak sites may be the only way to combat the problem.
“Recently, WHO called for $100 billion to find hopefully, actually, hundreds more international staff,” Hartl told HuffPost Live host Josh Zepps. “This is by far the biggest Ebola outbreak that we have ever seen. It is covering large parts of [Guinea, Liberia and Sierra Leone] and we need many people on the ground.”
Although there are some drugs for the virus in the works, they are still being tested, Hartl emphasized. Instead, he stressed the importance of hands-on specialists, like logisticians, communicators and public health experts.
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“There are several experimental treatments and vaccines that are extremely experimental, that have not been tested in humans,” he said. “They will not serve to stop this outbreak, maybe in the future, but again what we need in this outbreak is more boots on the ground."
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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)
ASSOCIATED PRESS
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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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)