A Russian medical worker, right, administers a shot of Russia’s Sputnik V coronavirus vaccine to a patient in a vaccination center in Moscow   –   Copyright  Credit: AP Russia’s Sputnik V vaccine has an efficacy of 91.6% against COVID-19, according to a study published in The Lancet. Scientists had previously been critical of the speed that the Russian jab was … Continue reading COVID-19 vaccine: Russia’s Sputnik V jab has efficacy of 91.6% against coronavirus, say experts