Health
Long-Term COVID-19 Vaccine Studies Hampered As Placebo Recipients Get Real Shot – WUWM
Copyright 2021 NPR. To see more, visit https://www.npr.org. ARI SHAPIRO, HOST: Tens of thousands of people who volunteered to participate in the Pfizer

ARI SHAPIRO, HOST:
Tens of thousands of people who volunteered to participate in the Pfizer and Moderna COVID-19 vaccine studies are still participating in follow-up research, though that’s somewhat hampered because many people who had been given a placebo shot opted to take the vaccine instead. NPR science correspondent Richard Harris reports on what’s left to learn and what information will be harder to get.
RICHARD HARRIS, BYLINE: A mix of altruism and self-interest drove people to volunteer…
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