[Basis of epidemiology].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004813:Epidemiology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007564:Japan; D008875:Middle Aged; D011315:Preventive Medicine