Previous viral symptoms and individual mothers influenced the leveled duration of human milk antibodies cross-reactive to S1 and S2 subunits from SARS-CoV-2, HCoV-229E, and HCoV-OC43. - Demers-Mathieu V; DaPra C; Mathijssen GB; Medo E (Journal of perinatology : official journal of the California Perinatal Association, 2021)