The future of primary health care is not directed towards the care of illness, nor to the sphere of the individual. The importance of the projection of this level of care is conditioned by its capacity to direct its priorities towards the promotion of health, working in the group sphere. For this reason, it requires different professional profiles to those who, until now, have been the main focus of care. "Primary Health Care should be the main function of any Health System", as it resolves 70-80% of human pathologies and fulfils, in addition to the curative functions, irreplaceable and decisive tasks of promotion and prevention. The Alma-Ata conference had a decisive influence on the proposals to transform the predominantly curative social security model into a new model based on the promotion and protection of health and the strengthening of primary health care structures as the central function of the national health system and an integral part of social and economic development.