Lebanese clown Sabine Choucair, a member of "Clowns Without Borders," performs for children in June at a Syrian refugee camp in the eastern town of Chtoura, Lebanon. Bilal Hussein/AP hide caption

itoggle caption Bilal Hussein/AP

A pregnant Somali woman gets a tetanus shot at a clinic in Mogadishu in 2013. The vaccination initiative was launched by the GAVI Alliance, UNICEF and the World Health Organization. Carl de Souza/AFP/Getty Images hide caption

itoggle caption Carl de Souza/AFP/Getty Images