What is the best mask for COVID-19? | New Pittsburgh Courier

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What is the best mask for COVID-19? | New Pittsburgh Courier

Not all masks offer the same level of protection for you and those around you. Martin Barth/EyeEm via Getty Images A mechanical engineer explains the science after 2 years of testing masks in his lab by Christian L'Orange, Colorado State University The Centers for Disease Control and Prevention has changed its guidelines about masks and … Continued

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