[The pediatrician and epidemiology]

Pediatrics and epidemiology are two specialties of medicine with independent training. The pediatrician is trained in a clinical setting with practice and theoretical knowledge throughout several years in an accredited hospital, whereas the epidemiologist is trained in a more theoretical basis with field works as its practice. Nevertheless, the pediatrician constantly uses the epidemiological method although he or she may not be aware of this. The purpose of this paper is to explain in a very short way, the relationship between both disciplines. Aspects of descriptive, analytic and experimental epidemiology are given.