Wearing face masks and coverings is recommended, or in some places mandatory, in public spaces to help stop the spread of COVID-19.But what kind of DIY face covering offers the best ...
(Nanowerk Spotlight) Triggered by the COVID-19 pandemic, the surge in demand for surgical masks and respirators has led to a global manufacturing rush. However, not all mask filter materials are ...
PHILADELPHIA — Two years into the COVID-19 pandemic, the public debate on masks is as heated as ever — especially in Philadelphia, which earned national attention for once again requiring masks in ...
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