The common transmission routes of STDs are: ① Sexual contact transmission: same-sex or heterosexual intercourse is the main mode of transmission, accounting for more than 95%, other similar sexual behavior (oral sex, anal sex, masturbation, kissing, touching, etc.) can also increase the chances of infection. ② indirect contact transmission: through contact with contaminated clothing, public goods or public sanitary ware, etc.; ③ blood and blood products transmission: importation of blood or blood products contaminated with pathogenic microorganisms, and intravenous addicts share syringes or needles; ④ vertical transmission from mother to child: the sick mother infects the fetus through the placenta, and infects the baby through the birth canal or breast milk when breastfeeding; ⑤ medical transmission: through (5) Medical transmission: infecting others through contaminated medical devices or infecting medical personnel themselves due to poor protection; (6) Transmission through organs or artificial insemination, etc.