"The immunity developed after Russian vaccines protects today from all known variants and mutations," Popova told the Rossiya 24 broadcaster.
Immunity after vaccination against coronavirus lasts 10-12 months, it is quite stable, she added.
During the coronavirus pandemic, Russia has taken the lead in the race to develop a vaccine, creating three different jabs: Sputnik V, developed by Moscow’s Gamaleya Institute; EpiVacCorona by the Siberian research centre Vector; and the Chumakov Research Institute's CoviVac.
