Russia says one-shot ‘Sputnik Light’ vaccine has 79% efficacy

Russia has approved a single-dose version of the Sputnik V Covid-19 vaccine after it showed almost 80% efficacy, according to the state-run fund that backed its development.

The 79.4% efficacy rate of the vaccine, called Sputnik Light, is based on an analysis of real-world data rather than a standard clinical trial, and interim results from final-stage study are expected later this month, according to a statement from the Russian Direct Investment Fund. Early and mid-stage studies showed no serious adverse events, RDIF said. One injection of Sputnik Light "significantly reduces the possibility of severe cases leading to hospitalization,” RDIF said in the statement.