Mix-and-match J&J Covid booster raised immune response after Pfizer vaccine, study finds
CNN
Using the Johnson & Johnson vaccine as a booster for people initially immunized with the Pfizer/BioNTech vaccine produces a strong immune response and may do more to elicit protection against severe disease, researchers reported Sunday.
Their small study of 65 volunteers who all initially got two doses of Pfizer/BioNTech's vaccine showed that using the J&J Janssen vaccine as a booster produced a slower but more sustained antibody response against the original strain of the virus, as well as the Delta and Beta variants, they said.
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