Effectiveness of Monovalent and Bivalent mRNA Vaccines in Preventing COVID-19–Associated Emergency Department and Urgent Care Encounters Among Children Aged 6 Months–5 Years — VISION Network, United States, July 2022–June 2023 | MMWR - CDC
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This report describes the effectiveness of monovalent and bivalent mRNA COVID-19 vaccines among children 6 months–5 years.