The strain that causes an often-fatal viral haemorrhagic fever is the primary causative agent in the current Ebola outbreak in the Democratic Republic of Congo and Uganda

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

The virus takes its name from the Ebola River, near the site of one of the first recorded outbreaks in what is now the DRC, in 1976. Four of these six species are known to cause…