© WHO/Josua Mulala Raymond A health worker is disinfected at an Ebola treatment centre in the eastern DR Congo. New vaccine trialMeanwhile, an expert panel convened by ( WHO) has recommended that a single licensed Ebola vaccine be evaluated in a randomised clinical trial for Bundibugyo virus disease. The WHO Technical Advisory Group on candidate vaccine prioritisation for Bundibugyo virus disease recommended Ervebo in a new report issued on Friday. Ervebo is the only licensed vaccine against the main form of Ebola virus disease, also known as Ebola Zaire. The experts emphasised that a vaccine developed specifically for Bundibugyo virus would remain the preferred option.