ATLANTA, GA - AUGUST 21:  Dr. Kent Brantly (R), an Ebola patient at Emory Hospital, stands with his wife, Amber Brantly, during a press conference announcing his release from the hospital on August 21, 2014 in Atlanta, Georgia.  Dr. Brantly and another patient, Nancy Writebol, were released from Emory Hospital after receiving treatment for Ebola that they both contracted while working as medical missionaries in Liberia.  (Photo by Jessica McGowan/Getty Images)