Karol Markowicz @karol
@DapoFish @trad951 There has not been a single study, with a control group, that shows any mask works. This is a fact. Studies with control groups are how we prove scientific hypotheses. It’s not via anecdotal evidence. If we’re going with anecdotes, I don’t wear a mask and have yet to get covid. — PolitiTweet.org
