Was the CDC’s latest change in masking guidance based solely on a faulty study from India?

Saturday, July 31, 2021
By Stevie Rosignol-Cortez

The latest adjustment in Centers for Disease Control advice about masking was based on “new science” about the delta variant of the coronavirus, CDC Director Rochelle Walensky said in a TV interview. An updated CDC document cites research from the U.S. and Israel into “breakthrough” delta infections of fully vaccinated people, as well as a study from India of patients protected by a vaccine not being used in the U.S.

“These early data suggest that breakthrough delta infections are transmissible,” the CDC says. The infections don't necessarily lead to higher risk of serious disease for the vaccinated, but the variant may be more readily transmissible to unvaccinated or immunosuppressed people they may encounter. That concern led the agency to advise that vaccinated people in areas experiencing generally high rates of infections should wear masks indoors.

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