The purpose of this article is to demonstrate the design and validation of a questionnaire, to study the importance of vaccines in the health of children. It is based on the analysis of a complete conceptual framework, considering the factors that show the current situation of vaccines, in the context of education for health and coexistence on the international scene. One thousand subjects from 76 countries participated in the study. The validity of the questionnaire was carried out with 15 experts, resulting in a content validity index (IVC) for each high dimension, with the mean IVC being the questionnaire with a Fleiss' kappa result of 0.96. The process led to a final design consisting of 12 items. The statistic used to identify the degree of consistency in the estimates and calculate the value of the match between the evaluators was the index Fleiss' kappa, which yielded an overall result of 0.57, which was considered moderate. The results obtained make it possible to conclude that the VACUNASEDUCA questionnaire is valid for understanding the status of vaccines, the importance of teacher training on health prevention, and the influence of student vaccination on the health of peers and teachers, from a gender perspective.
Keywords: COVID-19; education for health; gender; questionnaire; reliability; teacher training; vaccination schedule; vaccines; validity.