10News – ABC San Diego KGTV - With booster shots from Pfizer, Moderna, and Johnson & Johnson receiving backing from U.S. regulators, here is a breakdown of who is eligible and the
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FDA authorizes another booster dose of the Pfizer or Moderna COVID-19 vaccine for people age 50 and up - The Boston Globe
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Safety Monitoring of COVID-19 Vaccine Booster Doses Among Adults — United States, September 22, 2021–February 6, 2022 | MMWR
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Comparison of Moderna versus Pfizer-BioNTech COVID-19 vaccine outcomes: A target trial emulation study in the U.S. Veterans Affairs healthcare system - eClinicalMedicine
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