South Sudan begins mass inoculation campaign with cholera vaccines 

FILE - A South Sudanese girl suffering from cholera is being treated by medics in Juba Teaching Hospital in Juba, May 27, 2014. More than 1.1 million doses of oral cholera vaccine arrived in Juba, and will be dispatched next week to hot spots areas like the town of Bentiu.

More than 1.1 million doses of an oral cholera vaccine have arrived in South Sudan, as the government launched a program to inoculate more than 80 percent of the population. But the mass vaccination exercise faces numerous challenges, including a lack of access to the areas dealing with the worst cholera outbreaks.