777,000 girls under 15 At least 10 million unintended pregnancies occur each year among adolescent girls aged 15–19 years in the developing world. Source: World Health Organization
"No. Using condoms decreases your risk of getting HIV, Chlamydia, Gonorrhea, and Trichomoniasis. Since condoms don’t cover all skin surfaces they are less likely to protect you from diseases spread by skin-to-skin contact (e.g. Herpes, Genital Warts)."