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Canaday DH, Oyebanji OA, Keresztesy D, Payne M, Wilk D, Carias L, Aung H, St Denis K, Lam EC, Rowley CF, Berry SD, Cameron CM, Cameron MJ, Wilson BM, Balazs AB, King CL, Gravenstein S. Significant Reduction in Vaccine-Induced Antibody Levels and Neutralization Activity Among Healthcare Workers and Nursing Home Residents 6 Months Following Coronavirus Disease 2019 BNT162b2 mRNA Vaccination. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America. 2022 Aug 24; 75(1):e884-e887.
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.