[Present concept of epidemiology. The epidemiological method].
D003469:Culture; D004812:Epidemiologic Methods; D004813:Epidemiology / Q000145:classification; D006801:Humans; D009026:Mortality; D011315:Preventive Medicine; D012621:Seasons; D012737:Sex Factors
Concepto actual de epidemiología. El método epidemiológico.