What are the conditions required for HIV transmission?
May 23, 2019
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.
Three conditions are required for HIV transmission: (1) a source of infection; (2) a route of transmission; and (3) susceptible individuals.
Since HIV is primarily present in the bodily fluids of infected individuals and patients—including blood, semen, vaginal secretions, breast milk, urine, and saliva—avoiding contact with the blood and bodily fluids of HIV-positive individuals effectively prevents transmission. This constitutes avoiding exposure to the source of infection.
The second strategy is interrupting the routes of transmission. There are three primary routes:
First, bloodborne transmission—mainly through blood transfusions and 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. Interrupting these transmission routes can effectively prevent HIV infection. Finally, protecting susceptible populations remains critical; however, no fully developed and widely approved HIV vaccine is currently available.
