http://www.sciencemag.org/news/2020/11/more-data-its-covid-19-vaccine-russia-institute-offers-new-evidence-success > Science’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation. > Joining the flood of press releases announcing positive results from COVID-19 vaccine trials, developers of Russia’s Sputnik V vaccine today reported 91.4% efficacy from a second interim analysis of more than 18,000 people, bolstering a claim the team made on 11 November with scant evidence.