There is an effective vaccine for Ebola — but not for the variety spreading rapidly in the Democratic Republic of Congo. Trials are going on for several candidates. How long will it take?

While it marks the 17th Ebola outbreak in the DRC, it is just the third caused by the Bundibugyo strain, for which there are no...

Nearly 250 people are suspected to have died, and more than 1,100 are infected with the rare strain of Ebola in the DRC and Uganda, though the true spread of the virus is feared…