Covid-19 crisis: Sputnik V, Moderna vaccines work against Delta variant

The protective proteins are called neutralizing antibodies because they're capable of preventing the virus from entering cells

The makers of Moderna and Sputnik V vaccines on Tuesday claimed that their shots produced antibodies against the fast-spreading Delta mutant of coronavirus.

Denis Logunov, deputy director of Russia’s Gamaleya Institute that developed Sputnik V, claimed the vaccine is around 90 per cent effective against the Delta variant, the RIA news agency reported. The shot was previously found by the researchers to be almost 92 per cent effective against the original strain of coronavirus.

Logunov said the Delta variant efficacy figure was calculated based on information from digital medical records and on vaccination records.

American drug firm Moderna, too, said its vaccine produced