RESUMO
The presentation of the vaccination passbook is mandatory for student registration at the city of São Paulo's Municipal Schools of Infantile Education, as a form of stimulating parents to keep their children's immunizations calendar updated. However, attendants do not verify periodically if the vaccinations are correct. In order to overcome this problem, a project with the aim of facilitating the immunization control through a software that controls immunizations was tested at a Municipal School of Infantile Education. Of the 286 pupils registered in the system, 236 (82.5%) were notified that their vaccines were incomplete. Of these, 21.2% updated their vaccinations, 2.5% returned their passbooks unchanged, and the remainders were still in the process of updating. The program identified the imperfections and encouraged immunization, thus helping to prevent the propagation of transmissible diseases in the school environment.