The National Institutes of Health study found that the J&J shot followed by one of the mRNA vaccines as a booster produced a stronger immune response.
'Mix and Match' COVID-19 study finds Pfizer or Moderna boosters may be best for J&J vaccine
USA Today - 14 Oct 2021 02:35
The National Institutes of Health study found that the J&J shot followed by one of the mRNA vaccines as a booster produced a stronger immune response.
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