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Largest study on masks and Covid-19 demonstrates their effectiveness in the real world
Feb 15, 2025
yale.edu
1:01
Homemade cloth face masks likely need a minimum of two layers, and preferably three, to prevent the dispersal of viral droplets from the nose and mouth, a video case study indicates. https://cnn.it/32Qes5K | CNN
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WHO updated guidance on the use of masks for control of COVID-19: https://bit.ly/2AJYSMS The new guidance is based on evolving evidence and provides updates on: 😷who should wear a mask 😷when a mask should be worn 😷what a mask should be made of | World Health Organization (WHO)
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