Irene Koek, acting deputy assistant administrator of U.S. Agency for International Development, from left, Dr. Thomas "Tom" Frieden, director of the Centers for Disease Control and Prevention (CDC), and Judith Garber, acting assistant secretary of state for the Bureau of Oceans and International Environmental and Scientific Affairs, listen during a Senate Foreign Relations subcommittee hearing in Washington, D.C., U.S., on Wednesday, July 13, 2016. The hearing focused on the risks and response to the Zika outbreak in the western hemisphere. Photographer: Pete Marovich/Bloomberg via Getty ImagesCDC
