Dr. Sherif Zaki works at a microscope at the Centers for Disease Control and Prevention, Thursday, Nov. 10, 2016, in Atlanta.
Dr. Sherif Zaki works at a microscope at the Centers for Disease Control and Prevention, Thursday, Nov. 10, 2016, in Atlanta. Branden Camp AP
Dr. Sherif Zaki works at a microscope at the Centers for Disease Control and Prevention, Thursday, Nov. 10, 2016, in Atlanta. Branden Camp AP