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Although cloth masks have been widely adopted, many people still have questions about them. (Usplash/Vera Davidova)

COVID-19 masks FAQs: How can cloth stop a tiny virus? What’s the best fabric? Do they protect the wearer?

Epidemiologists reviewed 25 studies of cloth face masks. Here’s what they found out about how well they work, why they work, who they protect and why the mosquito and chain-link fence analogy is wrong.

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