J.&J. booster works well for people who had Pfizer originally, study finds.


By BY CARL ZIMMER from NYT Health https://ift.tt/3GdCzMf
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J.&J. booster works well for people who had Pfizer originally, study finds. J.&J. booster works well for people who had Pfizer originally, study finds. Reviewed by news100 on 4:05 PM Rating: 5

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