ABC News chief health and medical editor Dr. Richard Besser, revealed during a recent ABC News Ebola town hall event, on why America will not close her borders to West Africa.

Keeping people from leaving the Ebola-affected countries would be a “major mistake,” Besser said, noting that he saw aid workers, journalists and family members aboard his plane on his two trips to Liberia in the last few months, and that letting them in and out is important.

“You want to make sure that people who leave that area are being monitored and doing it safely,” he said. “You want to encourage people to go there who have expertise and can help these governments, these health workers, control this disease. That will save lives there and will also improve the health and protection of Americans right here.”

Varma said the biggest concern in America should be containing the outbreak in Africa. Until that happens, he said “we will always be at risk.”

“You can’t just wrap a wall around these countries and not expect people to get out,” he said.