Final answer:
HIV is transmitted through blood, semen, breast milk, and vaginal and cervical secretions; it is not spread through saliva, sweat, tears, or urine under normal circumstances.
Step-by-step explanation:
The body fluids that have been proven to transmit HIV infection are blood, semen, breast milk, and vaginal and cervical secretions. These fluids can contain high levels of the HIV virus, and when they come into contact with someone else's bloodstream or mucous membranes—found in the mouth, nose, and genital areas—the virus can be transmitted. HIV is not spread through saliva, urine, sweat, or tears under normal circumstances because these do not contain high levels of the virus. Although saliva can contain the HIV virus, it generally contains such a small quantity that it is not considered a risk for transmission unless it comes into contact with the bloodstream, such as through cuts or sores. It is also important to note that HIV cannot survive in fluids where host cells are not present.