The Food and Drug Administration opened booster shots for the Pfizer / BioNTech and Moderna COVID-19 vaccine to all adults today, the companies announced, expanding eligibility outside of the initial, vulnerable groups they were cleared for earlier this fall.
Although the COVID-19 vaccines available in the United States are still highly effective protection against severe cases of the disease, hospitalization, and death, protection against any infection or symptoms appears to be weakening. A third, booster shot of the vaccines could restore that protection: Pfizer showed in a clinical trial that the shot was around 95 percent effective compared with people who only had two doses, essentially restoring the same efficacy seen in the...
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FDA clears Pfizer and Moderna COVID-19 boosters for all US adults
![FDA clears Pfizer and Moderna COVID-19 boosters for all US adults]()
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November 19, 2021
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