Population Immunity to Pre-Omicron and Omicron Severe Acute Respiratory Syndrome Coronavirus 2 Variants in US States and Counties Through 1 December 2021
Klaassen F, Chitwood MH, Cohen T, Pitzer VE, Russi M, Swartwood NA, Salomon JA, Menzies NA. Population Immunity to Pre-Omicron and Omicron Severe Acute Respiratory Syndrome Coronavirus 2 Variants in US States and Counties Through 1 December 2021. Clinical Infectious Diseases 2022, 76: e350-e359. PMID: 35717642, PMCID: PMC9214178, DOI: 10.1093/cid/ciac438.Peer-Reviewed Original ResearchConceptsSARS-CoV-2 infectionSARS-CoV-2Immunological exposureOmicron variantSevere diseaseAcute respiratory syndrome coronavirus 2 infectionSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infectionFuture SARS-CoV-2 infectionSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variantsUS populationSyndrome coronavirus 2 infectionCoronavirus disease 2019 (COVID-19) vaccinationCoronavirus 2 infectionPopulation-level immunityPrior immunological exposurePopulation immunityImmune escapeVaccination dataInfectionInfection statusVaccinationUS statesEffective protectionDiseaseImmunity