A healthcare worker prepares a dose of Sputnik V (Gam-COVID-Vac) vaccine against the coronavirus disease (COVID-19) in a vaccination centre at a shopping mall in Omsk, Russia, June 29, 2021. REUTERS/Alexey Malgavko
MOSCOW: Russia's Sputnik V vaccine against COVID-19 has been shown to be less effective against the highly contagious Delta variant, TASS news agency reported on Tuesday, citing the vaccine's developers. (Reporting by Anton Kolodyazhnyy; Writing by Gabrielle Tétrault-Farber; Editing by Catherine Evans)
