Fucking hilarious
You mean their masks + hazmat suits do shit to prevent spread of Covid?
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Hazmat suits?
In case you haven't learned based introductory "masks 101" yet, they do not provide 100% protection but keep the number of infections (and deaths) from being significantly higher than they already are. So, yeah, they "do" plenty.
Plenty of healthcare workers world wide have been infected inspite of mask use.
Then there are the covidiots who work in quarantine facilities, as like in the OP, & in hospitals, etc, who may or may not follow safety protocols during their working hours. Or when they're off duty or at home they revert to covidiotism or are infected by such irresponsible ones whom they encounter in their lives elsewhere.