Two trucks crashed on a road toward Saint-Marc in Haiti. One truck was carrying Coke bottles, the other was full of people. The head-on collision knocked the bed off the back of one truck, killing several and injuring many more. Christopher Joyce/NPR hide caption

itoggle caption Christopher Joyce/NPR

Sick cholera victims and families wait at St. Nicolas Hospital in Saint-Marc, north of Port-au-Prince. Saint-Marc residents burned down nearby tents Wednesday that were supposed to relieve pressure on the hospital. Thony Belizaire/AFP/Getty Images hide caption

itoggle caption Thony Belizaire/AFP/Getty Images

A closeup of Eurytemora, a kind of copepod that serves as a reservoir for the cholera bacterium. Courtesy of Dr. Rita Colwell, University of Maryland hide caption

itoggle caption Courtesy of Dr. Rita Colwell, University of Maryland

Cholera victims in Haiti receive treatment at the St. Nicholas hospital in Saint Marc, Haiti. Dieu Nalio Chery/AP hide caption

itoggle caption Dieu Nalio Chery/AP

After recalls of a half-billion eggs, we will hear from the family tied to the farms at the center of the outbreak today. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP