Saliva and sweat are virtually free of HIV and pose essentially no risk of transmission.
HIV is mainly found in the blood, vaginal secretions, semen, pleural and abdominal fluid, breast milk, and cerebrospinal fluid of patients and infected persons. It is mainly transmitted to others through three ways: blood transmission, sexual transmission and mother-to-child transmission.
1. Transmission through blood: including blood transfusion, importation of blood products; acceptance of organ transplantation, tattooing, interventional manipulation, etc.; sharing of needles for drug injection or pricking the skin with HIV-contaminated needles.
2. Sexual transmission: refers to sexual contact between people of the same or opposite sex.
3. Mother-to-child transmission: HIV-infected mothers infect their newborns through the birth canal, placenta, breastfeeding and other channels.
There is no evidence to prove that saliva and sweat can transmit HIV.