CASTRO-TORRES, Yaniré; ESTAPÉ, Estela S.; SAN MARTÍN, María T.; HALLMAN, Deana. COVID-19 Serological Study in Non-infected Vaccinated Subjects: Differences among Age, Sex, and Vaccine Brand. Puerto Rico Health Sciences Journal, [S. l.], v. 42, n. 3, p. 203–206, 2023. Disponível em: https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/3098. Acesso em: 26 oct. 2025.