So a surgeon wearing a face mask has low oxygen and feints during an operation?
Face masks reduce particles including microbes and it does not stop air flow!
South Korea has Confirmed covid cases of 10,774, Recovered at 9,072 and deaths at 248
They all wear masks! They are all NOT dying!
UK 26,000 deaths, USA 60,000 deaths, NO MASKS,- you do the maths on masks!