Breakthrough SARS-CoV-2 Infections after Vaccination in North Carolina

Authors

Document Type

Journal Article

Publication Date

11-13-2022

Journal

Vaccines

Volume

10

Issue

11

DOI

10.3390/vaccines10111922

Keywords

Ad26.COV2.S; BNT162b2; Delta; Omicron; SARS-CoV-2 vaccination; age; booster vaccination; cumulative incidence; mRNA-1273; rural county

Abstract

We characterize the overall incidence and risk factors for breakthrough infection among fully vaccinated participants in the North Carolina COVID-19 Community Research Partnership cohort. Among 15,808 eligible participants, 638 reported a positive SARS-CoV-2 test after vaccination. Factors associated with a lower risk of breakthrough in the time-to-event analysis included older age, prior SARS-CovV-2 infection, higher rates of face mask use, and receipt of a booster vaccination. Higher rates of breakthrough were reported by participants vaccinated with BNT162b2 or Ad26.COV2.S compared to mRNA-1273, in suburban or rural counties compared to urban counties, and during circulation of the Delta and Omicron variants.

Department

Biostatistics and Bioinformatics

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