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JCVI statement on the adult COVID-19 booster vaccination programme and the Omicron variant: 7 January 2022 - GOV.UK
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Effectiveness of a COVID-19 Additional Primary or Booster Vaccine Dose in Preventing SARS-CoV-2 Infection Among Nursing Home Residents During Widespread Circulation of the Omicron Variant — United States, February 14–March 27, 2022 | MMWR
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