of his "Updated" Cochrane Review in front of him...Baron's just as much a nutcase and loser as his Avator, DJT...as anyone can see, that Cochrane 'Grab Bag' of studies is riddled with very questionable practices...compare and contrast with the NEJM study that is 100% COVID-19 data and 'Difference-in-Difference' analysis...best practice, for sure.
Link: https://healthfeedback.org/claimreview/multiple-studies-show-face-masks-reduce-spread-of-covid-19-cochrane-review-doesnt-demonstrate-otherwise/