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» Pfizer and Moderna shots are less effective in people with weak immune systems, a study finds.
Pfizer and Moderna shots are less effective in people with weak immune systems, a study finds.
By BY BENJAMIN MUELLER from NYT Health
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Two doses of either the Pfizer-BioNTech or Moderna vaccines offered a significant degree of protection, but far less than the shots’ benefit to people without immune deficiencies.
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