Long-Term Studies Of COVID-19 Vaccines Hurt By Placebo Recipients Getting Immunized

Leyda Valentine, a research coordinator, takes blood from Lisa Taylor as she participates in a COVID-19 vaccination study at Research Centers of America in Hollywood, Fla., in August 2020.

Researchers are trying to learn more about COVID-19 vaccines from original study participants. The quest is hampered because many people who first received a placebo shot are opting for the vaccine.

(Image credit: Joe Raedle/Getty Images)

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source https://www.npr.org/sections/health-shots/2021/02/19/969143015/long-term-studies-of-covid-19-vaccines-hurt-by-placebo-recipients-getting-immuni

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