Abstinence is the only 100% effective way to prevent transmission of STDs, including HIV. This includes oral sex.
Use a new latex condoms correctly every time you have vaginal, anal or oral. If you use a lubricant, be sure it is water-based.
Avoid drugs and alcohol because they can increase your chances of infection and can lead to risky behaviors.
Never share needles or injection equipment. Sharing needles or equipment to inject drugs, hormones, insulin or steroids — even once — can transmit HIV. This is because HIV from an infected person’s blood can remain in a needle or injection equipment and can then be injected into the bloodstream of the next person using the equipment.