Russia's Sputnik V vaccine is 91.6% effective against symptomatic Covid-19 and 100% effective against severe and moderate disease, according to an interim analysis of the vaccine's Phase 3 trial results.

The preliminary findings were published in The Lancet on Tuesday and are based on data gathered from 19,866 participants, of which around three-quarters (14,964) received two doses of the vaccine and a quarter (4,902) were given a placebo.

Sixteen cases of symptomatic Covid-19 were confirmed in the vaccine group 21 days after participants received the first vaccine dose. Sixty two cases were found in the placebo group -- equating to an efficacy of 91.6%.

The trial included 2,144 people over the age of 60 and a sub-analysis conducted on this group revealed the vaccine was well tolerated and had a similar efficacy of 91.8%.

This article was originally written by Zamira Rahim for CNN on February 2, 2021:
http://cnn.it/2NjFGMm

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