What are the conditions required for HIV transmission?
Jul 26, 2021
Source: Cainiu Health
Dr. Chen Tansheng
Introduction
First, the source of infection; second, the route of transmission; and third, susceptible individuals. Since HIV primarily resides in the bodily fluids of infected individuals and AIDS patients—such as blood, semen, vaginal secretions, urine, and saliva—avoiding contact with the blood and bodily fluids of HIV-positive individuals can prevent transmission.
HIV transmission requires three conditions: (1) a source of infection; (2) a route of transmission; and (3) susceptible individuals. Since HIV is primarily present in the body fluids of infected individuals and AIDS patients—including blood, semen, vaginal secretions, breast milk, urine, and saliva—avoiding contact with the blood and body fluids of HIV-positive individuals effectively prevents transmission, thereby eliminating exposure to the source of infection.
The second key strategy is interrupting the routes of transmission, which occur primarily through three pathways:
First, bloodborne transmission—mainly via transfusion of contaminated blood or blood products;
Second, sexual transmission—including both heterosexual and homosexual contact; the most effective preventive measure is abstaining from premarital and extramarital sexual activity;
Third, mother-to-child transmission. Effectively interrupting these transmission routes can prevent HIV infection in most cases. Finally, protecting susceptible populations remains essential; however, no fully developed and widely approved HIV vaccine is currently available.
