According to the Deputy Prime Minister, the leaders in herd immunity in 
RUSSIA are Sevastopol, St. Petersburg,Karelia and Chukotka The level of herd immunity to 
covid-19 in Russia increased from 63.7% to 64.4% over the week. This was announced by Russian Deputy Prime Minister Tatyana Golikova, reports TASS. “As of January 21, vaccination with the first component was carried out 81,981,......