covid-19 has been actively mutating over the past six months, and has also become more variable. This was stated by the
HEAD of Rospotrebnadzor Anna Popova, speaking at the forum of the Russian society "Knowledge", RIA Novosti reports. “The virus is unknown, we have known
it not so long ago. In order to fully study it, of course, not much time has passed, especially since it has been mutating so i...