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Health care workers, wearing protective suits, leave a high-risk area at the French NGO Medecins Sans Frontieres (Doctors without borders) Elwa hospital on August 30, 2014 in Monrovia. Liberia has been hardest-hit by the Ebola virus raging through west Africa, with 624 deaths and 1,082 cases since the start of the year. AFP PHOTO / DOMINIQUE FAGET        (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)
Health care workers, wearing protective suits, leave a high-risk area at the French NGO Medecins Sans Frontieres (Doctors without borders) Elwa hospital on August 30, 2014 in Monrovia. Liberia has been hardest-hit by the Ebola virus raging through west Africa, with 624 deaths and 1,082 cases since the start of the year. AFP PHOTO / DOMINIQUE FAGET        (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)

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    Questions and answers about Ebola

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Questions and answers about Ebola

CNN's Dr. Sanjay Gupta is at the CDC and answers your questions about Ebola.

Questions and answers about Ebola

CNN's Dr. Sanjay Gupta is at the CDC and answers your questions about Ebola.