Vaccination in children under five years of age

Objective. To compare vaccination coverage and associated factors in children under five years in Mexico, according to data from the 2021-2023 Continuous National Health and Nutrition Survey (2021-2023 Continuous Ensanut) and the 2012 National Health and Nutrition Survey (2012 Ensanut).Materials and methods. Prevalence analysis of the vaccination status of Mexican children was estimated from data recorded in the vaccination record or any other probatory document obtained from either survey. If the administration of the immunogen complied with the recommendations of time intervals between doses and minimum and maximum age of administration recommended by the National Center for Child and Adolescent Health, the doses were considered valid, and the participant was included in the analyses. Results. In children under five, 2021-2023, Continuous Ensanut vaccination coverage of BCG, hepatitis-B, polio/DPT, anti-pneumococcal, anti-rotavirus, and triple viral vaccines was 86.5, 63.7, 68.9, 86.6, 81.3, and 71.3%, respectively. At one and two years of age, 45.6 and 32.4% had received the complete scheme, respectively. From 2012 to 2021-2023, vaccination coverage with BCG, hepatitis B, and polio/DPT decreased, and those of pneumococcus and rotavirus increased. Conclusion. In 2021-2023, the vaccination coverage indicator (95%) was not reached for any vaccine investigated.