Duke mask study: Some masks may be worse than no mask at all in slowing spread of COVID 19

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Almost any kind of mask is better than no mask. A new study from Duke University shows most homemade masks are better at preventing infection than not wearing mask it all but their effectiveness. Khun vary depending on fabric and fit. They tested 14 types of masks and found the N 95 to be the most effective while homemade cotton masks work better if they had layers, the study found fleece neck gators to be worse than no mass. However, and potentially counterproductive. Health Update a show KABBALAH, NBC news

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