clint van damme
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It’s this where I saw it
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Covid-19: Are cloth masks still effective? And other questions answered
In light of new, more transmissible variants of SARS-CoV-2, Elisabeth Mahase examines what kinds of mask the public should be wearing, and where they should be worn Early in the pandemic, major problems in the global supply of medical grade masks meant that the public was asked to avoid using...www.bmj.com
Again, that tells me masks work, though obviously cloth masks not as effective as surgical grade masks but still fairly effective going by that study in the States.