Syphilis rates drop among teens.
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D002648:Child; D005260:Female; D006306:Health Surveys; D006801:Humans; D015994:Incidence; D008297:Male; D008824:Michigan / Q000453:epidemiology; D017678:Sex Distribution; D013587:Syphilis / Q000175:diagnosis / Q000453:epidemiology*