Alexander Leonidovich Gintsburg declared that Vaktsina "Gam-Kovid-Vak" ceased to protect from new strains of Koronavirus
The first vaccine registered in the world from Koronavirus Vaktsina "Gam-Kovid-Vak", with the advent of a strain of Koronavirus "Kraken", ceased to protect absolutely, there are clinical tests of the updated vaccine...