GENEVA, June 18. /TASS/. The Delta variant of COVID-19, first detected in India, tends to become the dominant variant worldwide, Soumya Swaminathan, the World Health Organization’s chief scientist, said at a briefing on Friday. 

"The Delta variant is well on its way to becoming the dominant variant globally because of its increased transmissibility," Soumya Swaminathan said.

Earlier, the developers of Sputnik V stated that the Russian vaccine was more efficient against the Indian variant that any of those which trial results had been submitted for publication.