Thread on a pre-Covid study (influenza), before masks became political. 99% of viral particles were found ... in the aerosol fraction, leaving masks with no chance of being effective, hence all those RCT results. Recall all those diagrams demonstrating the 2-meter rule? Toss 'em. https://t.co/t4sVeapF7l

— Nick Hudson (@NickHudsonCT) March 5, 2021