HIV is spread only in certain body fluids from a person infected with HIV. These fluids are blood, semen, pre-seminal fluids, rectal fluids, vaginal fluids, and breast milk.
In the United States, HIV is spread mainly by having sex or sharing injection drug equipment, such as needles, with someone who has HIV.
To reduce your risk of HIV infection, use condoms correctly every time you have vaginal, oral, or anal sex. Don’t inject drugs. If you do, use only sterile injection equipment and water and never share your equipment with others.
Pre-exposure prophylaxis (PrEP) is an HIV prevention option for people who don’t have HIV but who are at high risk of becoming infected with HIV. PrEP involves taking a specific HIV medicine every day. PrEP should always be combined with other prevention options, such as condoms.