Two epidemics in just three months. Equatorial Guinea and Tanzania facing the Marburg virus, a close cousin of Ebola.
Until the early 2020s, there was no more than one outbreak every three to four years. The danger is all the greater since, unlike Ebola, "there is no vaccine or specific post-exposure treatment," says Cesar Munoz-Fontela, a specialist in tropical infectious diseases. The first effective vaccine, Everbo, did not appear until 2015, a year later.