“…Since the Brazilian National Immunization Program (Programa Nacional de Imunização) was implemented, the nursing team has been primarily responsible for planning, carrying out, monitoring and evaluating actions, within the scope of PHC, which aim to expand vaccine coverage and reduce morbidity and mortality from preventable diseases in a population. 13,14 The effectiveness of these practices depends on a set of skills, such as scientific knowledge about immunology, on the factors that influence the immune response (related to the vaccinee and the vaccine), on composition, route of administration, interactions, contraindications of immunobiological agents and adverse effects expected post-vaccination; furthermore, technical and operational knowledge of the functioning of the cold chain at national, state, municipal and regional levels (vaccine room), which includes storage, transportation, handling of vaccines under appropriate conditions, from the producing laboratory to the moment of dose application; also, register applied and missed doses, develop search for absenteeism, blocking actions and campaigns to protect individuals and the community against preventable diseases. 13,15 In the context of PHC, Family Health Units also develop actions of promotion, prevention, protection, diagnosis, treatment, rehabilitation, harm reduction, palliative care and health surveillance that are performed by a multidisciplinary team for a defined population.…”