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Safety of the fourth COVID-19 BNT162b2 mRNA (second booster) vaccine: a prospective and retrospective cohort study - The Lancet Respiratory Medicine
NSW Health - Unsure when to get your COVID-19 booster shot? Booster vaccinations are available for people aged 16 years and over, and can be given 3 months after your second dose
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La Moncloa. 11/11/2022. More than 60% of people aged over 80 years have a second booster dose of COVID-19 [Government/News]
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Effectiveness of a second BNT162b2 booster vaccine against hospitalization and death from COVID-19 in adults aged over 60 years | Nature Medicine
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