A boy with symptoms of cholera waits for treatment at the St. Catherine hospital in Cite Soleil in Port-au-Prince on Nov. 10, 2010. Cholera has sickened more than 91,000 Haitians and killed more than 2,000. Ramon Espinosa/AP hide caption

itoggle caption Ramon Espinosa/AP

Two sisters rest under a mosquito net during a July monsoon rain in Prey Mong kol village in Cambodia's Pailin province. Paula Bronstein/Getty Images AsiaPac hide caption

itoggle caption Paula Bronstein/Getty Images AsiaPac

Scientists say cranberry's medicinal powers include preventing bacteria like E. coli and staph from sticking to cells. Zac Visco for NPR hide caption

itoggle caption Zac Visco for NPR