- Source: List of sexually transmitted infections by prevalence
- Seks anal
- AIDS
- Prevalensi sunat
- Homoseksualitas
- Pemotongan kelamin perempuan
- List of sexually transmitted infections by prevalence
- Sexually transmitted infection
- Vertically transmitted infection
- Human papillomavirus infection
- Pelvic inflammatory disease
- Sexual intercourse
- Mycoplasma genitalium
- Herpes simplex virus
- HIV
- Circumcision
Sexually transmitted infections (STIs), also referred to as sexually transmitted diseases (STDs), are infections that are commonly spread by sexual activity, especially vaginal intercourse, anal sex and oral sex. The most prevalent STIs may be carried by a significant fraction of the human population.