Epidemiology and the public health laboratory.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003140:Communicable Disease Control; D004813:Epidemiology; D005260:Female; D006306:Health Surveys; D006801:Humans; D007114:Immunization; D007223:Infant; D007231:Infant, Newborn; D007753:Laboratories; D008875:Middle Aged; D011634:Public Health; D014626:Vaginal Smears