Mucosal antibody responses to SARS-CoV-2 booster vaccination and breakthrough infection

mBio. 2023 Dec 1;14(6):e0228023. doi: 10.1128/mbio.02280-23. Online ahead of print.

Abstract

Antibodies on mucosal surfaces of the upper respiratory tract have been shown to be important for protection from infection with SARS-CoV-2. Here we investigate the induction of serum IgG, saliva IgG, and saliva sIgA after COVID-19 mRNA booster vaccination or breakthrough infections.

Keywords: SARS-CoV-2; booster vaccination; breakthrough infection; mRNA vaccine; sIgA; saliva; spike.