Antibody decline occurred from 2 weeks to 6 months post-BNT162b2 mRNA vaccination in nursing home (NH) residents and healthcare workers. Antispike, receptor-binding domain, and neutralization levels dropped >81% irrespective of prior infection. Notably, 69% of infection-naive NH residents had neutralizing antibodies at or below the assay's limit of detection.
Keywords: COVID-19; antibody; long-term care; vaccine.
© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America.