Russia Affirms its Sputnik V COVID-19 Vaccine is 92% effective

Russia's Sputnik V vaccine is 92% effective at protecting people from the coronavirus according to interim trial results, according to the country's sovereign wealth fund on Wednesday.

Russia's Vaccine

Moscow's results are only the second from a late-stage human trial, following on swiftly from data released on Monday by Pfizer Inc and BioNTech, which said their shot was also more than 90% effective.

While experts said the Russian data was encouraging and reinforced the idea the pandemic could be halted by vaccines, they warned that the results were only based on a small number of trial volunteers who had contracted COVID-19.

The analysis was conducted after 20 participants developed the virus and examined how many had received the vaccine versus a placebo. That is significantly lower than the 94 infections in the trial of the vaccine being developed by Pfizer and BioNTech.

"I assume there was political pressure after the press release from Pfizer and BioNTech earlier in the week to now draw level with their own data," said Bodo Plachter, deputy director of the Institute of Virology at the Mainz University. "What is missing for now is an analysis of statistical significance."

To confirm the efficacy rate of its vaccine, Pfizer said it would continue its trial until there were 164 COVID-19 cases.

The Russian Direct Investment Fund (RDIF), which has been backing Sputnik V's development, said the Russian trial would continue for six months.

Alexander Gintsburg, director of the Gamaleya Institute which developed the vaccine, said the interim results demonstrated that Sputnik V was effective and mass vaccinations would be rolled out in Russia in the coming weeks.

European stocks and U.S. stock futures extended their gains slightly after Russia's announcement though the reaction was far more muted than after Pfizer's results.