Director of the National Institute of Allergy and Infectious Diseases Dr. Anthony Fauci joined Chris Wallace on Fox News Sunday today to share some of the medical science behind Ebola and how the deadly virus can be effectively prevented and treated.

Fauci said that experimental Ebola drugs are just that – experimental. As those potential vaccines are not yet fully developed or widely available, the most important treatment for an Ebola patient is good, thorough, primary medical care.

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Wallace pointed out that British airlines have already suspended all flights to and from the three infected countries in West Africa, but Fauci countered that closing off countries in the midst of an outbreak can often exacerbate the problem.

“Experience is that when you close off a country, you create such stress and fear and amplify the problem. So, I think any healthcare person will agree with me that that’s not a good idea to completely block off the country,” Fauci said.

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As for the threat of infected passengers boarding a plane in West Africa and arriving in the U.S., Fauci explained that the most effective prevention is to do an exit screening, which would include taking a passenger's temperature and having them fill out a questionnaire.

When Wallace asked if Ebola could be used by terrorists, Fauci said that right now nature is the worst bioterrorist.

"I’m worried more about natural evolution in West Africa than I am about a terrorist,” he said.

“If I were a bio-terrorist, [Ebola] would not be my choice. It would be inefficient. Nature does it much worse than a bioterrorist.”

Watch the clip from Fox News Sunday above.

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