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CDC says study of 1,800 U.S. health care workers confirms efficacy of Pfizer and Moderna vaccines



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CDC says study of 1,800 U.S. health care workers confirms efficacy of Pfizer and Moderna vaccines CDC says study of 1,800 U.S. health care workers confirms efficacy of Pfizer and Moderna vaccines Reviewed by Moltivie on May 21, 2021 Rating: 5

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