A new Ebola outbreak in DRC raises concerns. Learn about the Bundibugyo strain, symptoms, and Nigeria's preparedness to combat the deadly virus.

The rare type of Ebola, known as Bundibugyo virus, spread undetected for weeks following the first known death while authorities tested for another virus. | World News

The Bundibugyo strain of Ebola has a fatality rate of up to 50 percent and no approved vaccine as yet.