Tapia, B., Weitzel, C. ., Inzunza, J., Weitzel, J. . and Muñoz-Mendoza, C. L. . (2023) “Effectiveness of influenza vaccines in elderly in the Ñuble region, years 2015, 2017 and 2019”, Revista Chilena de Salud Pública, 27(2), pp. 101–108. doi: 10.5354/0719-5281.2023.74348.