Malaria Vaccine Shows Promise–Now Come Tougher Trials

April 26, 2021

(Nature) – A vaccine against malaria has shown promise in early clinical trials, raising hopes that it might one day prove to be an effective weapon against one of the world’s biggest killers of children. In a trial in 450 children aged 5–17 months, the vaccine, called R21, was up to 77% effective at preventing malaria over the course of one year — which, if confirmed, would clear a 75% effectiveness target set by the World Health Organization. The results are presented in a preprint posted on the server SSRN on 20 April.