Horna-Campos, O., Vargas Atton, L. and Guggiana Nilo, P. 2026. Regional Diphtheria Epidemiological Alert: The Importance of Vaccination and Epidemiological Surveillance. Revista Chilena de Infectología. 43, 4 (Jul. 2026). DOI:https://doi.org/10.4067/s0716-10182026000400153.