Follow-Up of SARS-CoV-2 Antibody Levels in Belgian Nursing Home Residents and Staff Two, Four and Six Months after Primary Course BNT162b2 Vaccination. - Meyers E; De Rop L; Engels F; Gioveni C; Coen A; De Burghgraeve T; Digregorio M; Van Ngoc P; De Clercq N; Buret L; Coenen S; Deschepper E; et al. (Vaccines, 2024)