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Five takeaways on the science behind CDC’s latest mask guidance

With surges in Covid-19 cases driven by the Delta variant, most Americans are now being advised to wear masks indoors — regardless of vaccination status — by the US Centers for Disease Control and Prevention.

With surges in Covid-19 cases driven by the Delta variant, most Americans are now being advised to wear masks indoors — regardless of vaccination status — by the US Centers for Disease Control and Prevention.

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