http://www.sciencemag.org/news/2021/08/russia-s-sputnik-v-protects-against-severe-covid-19-delta-variant-study-shows

A nurse administers the Sputnik V vaccine at a vaccination center in Moscow on 4 August. Only about 22% of the Russian population is fully vaccinated, and COVID-19 cases in the country are surging.

Russia’s Sputnik V vaccine is holding up well against the Delta variant, a paper posted yesterday on the preprint server medRxiv shows. The study of nearly 14,000 people showed the two-dose vaccine reduces the risk of hospitalization with COVID-19 by 81% and helped prevent severe lung injury.