Why don't they use the controlled trials that already exist? Because the truth hurts their agenda.
https://www.rcreader.com/commentary/masks-dont-work-covid-a-review-of-science-relevant-to-covide-19-social-policy?fbclid=IwAR0JkonUf5ssr0cH6jv8XrOJjnUAxn76IOvJoUN4f9GalcAq2uX-K7sZv1U
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