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CDC on X: "CDC recommends that certain populations receive a booster shot of Pfizer-BioNTech's #COVID19 Vaccine at least 6 months after completion of their 2-dose Pfizer-BioNTech vaccine series. See full details: https://t.co/77CTFv1g4m.
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Booster Shots and Additional Doses for COVID-19 Vaccines — What You Need to Know | Johns Hopkins Medicine
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