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Vaccination against COVID-19 for children aged 5 to 11 The Lancet Effectiveness of the BNT162b2 vaccine against Omicron in children aged 5 to 11 years NEJM nejm.org The pediatric COVID vaccine is only 51% effective at Omicron, according to the Ynetnews study Efficacy of Pfizer-BioNTech BNT162b2 vaccine against Delta and Omicron SARS-CoV-2 variants among adolescents …