OBJECTIVES: The objective of this article is to make an analysis of the dynamics of the imunization schedule and an updating of the practical aspects of the vaccination. METHODS: The authors, based on the official recommendations, in the imunization schedule of the Infectology Department of the Brazilian Society of Pediatrics and on their experience, present practical aspects to facilitate the understanding of the dynamics of application of the calendar. RESULTS: The current calendar of the Brazilian Society of Pediatrics (SBP) is presented with a practical analysis of the vaccines BCG, hepatitis B, poliomyelitis, Haemophilus influenzae type b (Hib), DPT and triple viral, which are also part of the Calendar of the National Program of Immunizations. Besides this, they analyze two other suitable vaccines for SBP, against varicella and hepatitis A. Finally they comment on the risk of urbanization of the yellow fever and the increasing indication of vaccination against this disease in Brazil. CONCLUSIONS: The imunization schedule should be dynamic, adapted to the epidemiologic characteristics of each country or place. The presented calendar is what is now recommended by the Infectology Department of the Brazilian Society of Pediatrics (SBP).