The World Health Organization (WHO) announced the start of the first clinical trial of an Ebola vaccine in the outbreak that began in the Democratic Republic of Congo (DRC), according to Al Jazeera.

Trial participants were vaccinated with the Ervebo vaccine in Bunia, the capital of Ituri province and the epicenter of the outbreak. The DRC declared its 17th and worst-ever Ebola outbreak in May and has since reported more than 9,700 cases, with deaths exceeding 4,600.