image credit: Lydia Polimeni NIH / Flickr

NIH study finds mixing COVID-19 boosters increases immune response

October 13, 2021


Scientists at the FDA and Centers for Disease Control and Prevention have been grappling with the question of who needs an additional vaccine dose, and when, for weeks now.

The authorization of a third dose of Pfizer and BioNTech’s vaccine for certain groups in late September left without guidance tens of millions of Americans who received either Moderna’s or J&J’s shot for their initial vaccination. CDC data shows that nearly 9 million Americans have received a booster shot to date, although it does not distinguish whether they were part of groups authorized to receive one. Reports indicate Americans across the country are seeking out boosters even if one is not yet recommended for them.

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