Masks reduce the chance of inhaling or exhaling viral particles by 75% If it's a N95 mask then it's 95%. It's not a perfect system , but it does prevent virus containing aerosols from passing.
There is a reason why medical staff are wearing N95's, and why medical staff infection rates are 1/2 the general population, despite working with infectious COVID positive patients on a daily basis.
I doubt Osterholm made such claims, and if he did it's probably being taken out of context.
Stop making excuses, & stop being whining little bitches and wear a mask.
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