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U.S. Is In A Race Between Vaccines And Variants, Says Public Health Expert

Despite the progress in vaccinating Americans, there's concern about the threat posed by COVID-19 variants. The White House is urging not to "let down our guard."

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Pien Huang is a health reporter on the Science desk. She was NPR's first Reflect America Fellow, working with shows, desks and podcasts to bring more diverse voices to air and online.