The current issue of the journal Pediatrics has the results of a survey of a representative sample of more than 800 girls aged 14 to 19 years who were interviewed, had physical exams, and were tested for five sexually transmitted infections (STIs): Neisseria gonorrhoeae, Chlamydia trachomatis, Trichomonas vaginalis, herpes simplex virus type 2, and any of the high-risk types of human papillomavirus (HPV). The findings as presented in the article's summary:
"Prevalence of any of the 5 STIs was 24.1% among all and 37.7% among sexually experienced female adolescents. HPV (23 high-risk types or type 6 or 11) was the most common STI among all female adolescents (prevalence: 18.3%), followed by C trachomatis infection (prevalence: 3.9%). Prevalence of any of the STIs was 25.6% among those whose age was the same or 1 year greater than their age at sexual initiation and 19.7% among those who reported only 1 lifetime sex partner."
So about one-quarter of adolescent girls have at least one STI, and the risk is significant even if the girl has had just one sex partner. She may have had just one partner, but he's infected, she soon will be. The word should get out. This research was conducted at the CDC.