ATLANTA (AP) -- -

The Ebola virus has killed more than 700 people in Africa and health officials say it could have catastrophic consequences if allowed to spread. So why would anyone allow infected Americans to come to Atlanta?

The answer, experts say, is because Emory University Hospital, with its super-secure isolation unit, is one of the safest places in the world to treat someone with Ebola.

Dr. Bruce Ribner, who will be treating two infected Americans there, insists that "nothing comes out of this unit until it is non-infectious."

He also says medical workers risking their lives overseas deserve the best treatment they can get.

Dr. Kent Brantly, was the first person infected with Ebola to be brought to the United States. Fellow aid worker Nancy Writebol is expected to arrive today.

The director of the U.S. Centers for Disease Control and Prevention, Dr. Tom Frieden, says his agency received "nasty emails" and at least 100 calls from people questioning why the sick aid workers should be let into the country.

He says he understands people's concerns, but he hopes that "fear of the unfamiliar does not trump our compassion" for ailing fellow Americans.

Do you feel it's the right thing to bring those 2 Americans home?