Interesting information on Herd Immunity
40-60 % 'pre-existing prevalence'; begins to give more sense to this observation in Stockholm.
https://www.bbc.com/future/art....icle/20200716-the-pe
Interesting information on Herd Immunity
40-60 % 'pre-existing prevalence'; begins to give more sense to this observation in Stockholm.
https://www.bbc.com/future/art....icle/20200716-the-pe