BBCNEWS BBC News November 26, 2021 14:06:00
Other thing is, countless virus escape from immunity through a natural infection? 0r escape from immunity through a natural infection? or more importantly immunity few vaccination? it is incredibly important for us to understand those two elements. i should flag as well but often when a virus mutates it may mutate to escape from immunity, for example, from antibodies, but often those mutations come at a fitness cost to the virus, so the virus sometimes has to forego some of its previous fitness ...
Source: archive.org