American physician Dr. Kent Brantly, infected with the Ebola virus, recently returned to the United States for treatment. While he is improving, according to the director of the Centers of Disease control Dr. Tom Frieden, it is too soon to know whether he will survive this devastating infection. Nancy Writebol, a coworker of Dr. Brantly, also infected with Ebola, will be transported to the U.S. later this week. Should we be worried? Is this a real life version of the new TV series "The Strain"?