Ebola outbreak in DRC may be mutating as cases pass 4,000

Health officials fear the Ebola virus behind a massive outbreak in the Democratic Republic of the Congo could be mutating, as confirmed cases pass 4,000. The Africa Centres for Disease Control and Prevention announced a major escalation, including door-to-door searches for patients, after noting unprecedented severity in the Bundibugyo strain outbreak. The outbreak, centered in Ituri province, has spread to four other provinces and is now the second-largest on record, with high levels of untracked transmission.