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David Keating
DavidLKeating
1/ On February 2, 2021 the National Personal Protective Technology Laboratory (NPPTL) published assessments for many foreign made masks, including KN95s. Some minimum #KN95 filtration results were < 26%! But
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Great article by @zeynep and @jeremyphoward. To answer the question they get asked what and "where to buy proper masks," below is a thread. I have no financial interest in
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