Surveillance and the primary care physician.
D000293:Adolescent; D003140:Communicable Disease Control; D003141:Communicable Diseases / Q000453:epidemiology; D006801:Humans; D011159:Population Surveillance; D011315:Preventive Medicine; D011320:Primary Health Care; D011635:Public Health Administration; D013812:Therapeutics; D014481:United States