Just weeks before PIH launched the Haiti cholera vacciation project, NPR's Jason Beaubien visited our cholera treatment centers in order to understand the scope of what's being done. With more than 525,000 Haitians infected and 7,000 killed, Haiti's cholera epidemic is now the world's largest. 


Partners in Health, a Boston-based nonprofit, is planning to launch an unprecedented cholera vaccination campaign to try to curb the outbreak — but it faces many challenges, including a shortage of the vaccine.

For decades, Haiti had been considered a potential cholera flash point. Even before the 2010 earthquake, roughly 50 percent of Haitians lacked access to clean water, and 80 percent didn't have adequate sewage systems, according to the World Health Organization.

Read more of Jason Beaubien's "Can Vaccines Break Cholera's Deadly Hold On Haiti?"