The Russian vaccine is 100% effective in severe cases due to COVID-19 and 91.4% in general Posted byEntrepreneur en Español December 15, 2020 Leave a comment on The Russian vaccine is 100% effective in severe cases due to COVID-19 and 91.4% in general This Monday it was announced that, according to the results produced during the third phase of clinical trials, Sputnik V does have a high percentage of effectiveness.