An STD is an infection that can be caused by bacteria, fungi, parasites or viruses and is generally transmitted by blood, semen and vaginal fluids from one person to another through sexual intercourse, either vaginally, anally or oral.
The most common sexually transmitted diseases are:
- Chlamydia
- Genital herpes
- Gonorrhea
- HIV and AIDS
- HPV
- Crabs
- Syphilis
- Trichomoniasis