COVID-19 Vaccine Effectiveness Among Older Adults. - Laniece Delaunay C; Mateo-Urdiales A; Pérez-Gimeno G; O'Reilly K; Uras M; Erdwiens A; Mlinaric I; Túri G; Martínez-Baz I; Meijer A; Rodrigues AP; Lazar M; et al. (JAMA network open, 2026)