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How well do face masks protect against COVID-19?
The virus that causes COVID-19 spreads mainly through the air when a person coughs, sneezes, sings, talks or breathes. Virus particles can drift in the air and be inhaled, especially in crowded places ...
Add Yahoo as a preferred source to see more of our stories on Google. Doctors still suggest masking up in places like your local grocery store if COVID-19 cases are high in your area. (Getty Images) ...
The ability to quickly and cost-effectively screen people for COVID-19 is an essential part of addressing the ongoing pandemic, and NASA is leveraging its expertise to assist in tackling the issue ...
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