Vaccination coverage among children under one year of age in the Agreste region of Pernambuco from 2019 to 2023: A descriptive analysis. Research, Society and Development, [S. l.], v. 15, n. 2, p. e3915250650, 2026. DOI: 10.33448/rsd-v15i2.50650. Disponível em: https://rsdjournal.org/rsd/article/view/50650. Acesso em: 12 feb. 2026.