Cloth Masks Don't Work

PSST. Dunno if people know this re: Bangladesh

The cloth mask that FAILED to reduce sx driven, serologic sars-cov-2 was like the Rolls Royce of cloth masks 👇👇👇

Not the ford-pinto cloth masks we have been using in USA for 18 months.... pic.twitter.com/Ao8SOfKqw1

— Vinay Prasad, MD MPH 🎙️📷 (@VPrasadMDMPH) September 2, 2021

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