A little-known strain of Ebola virus is behind an ongoing health emergency, prompting researchers to call for the acceleration of vaccine candidates against such infections

With a rising number of cases, at least 80 suspected deaths and no approved vaccine, fears are mounting.

The outbreak is only the third caused by the rare Bundibugyo virus, for which there are no approved vaccines or therapeutics.

The WHO is investigating potential vaccines and treatments for a potentially lengthy Ebola outbreak in the Democratic Republic of Congo, which has been declared an international…