COVID-19

Are two COVID masks better than one?

One mask might be OK during a dog walk, but indoor spaces require more layers of protection. Image: REUTERS/Sergio Perez

Beatrix Lockwood

Journalist, Reuters

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KN95 masks are shown for sale in a vending machine at the airport during the outbreak of the coronavirus disease (COVID-19) in San Diego, California, U.S., February 4, 2021. REUTERS/Mike Blake - RC2WLL9PAV7E
KN95 masks are shown for sale in a vending machine at an airport. Image: REUTERS/Mike Blake
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COVID-19Pandemic Preparedness and ResponseGlobal Health

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