Nice summary of three recent studies of mask effectiveness with links to the actual research reports. My favorite is the study of two Covid-positive hair stylists who did not pass on the virus to any of their clients. https://www.jwatch.org/fw116834/2020/07/14/studies-show-importance-face-coverings-limiting-spread?query=C19&cid=DM95413_NEJM_Registered_Users_and_InActive&bid=227686699
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Studies on mask effectiveness
Studies on mask effectiveness
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