The HIV virus is found in semen, blood, rectal fluids, vaginal fluids and breast milk.
The most common ways of getting HIV is through unprotected anal sex without a condom, by sharing syringes or needles to inject drugs or by sharing sex toys without using condoms.
HIV infection can be hard to spot in its early stages. Left untreated, a person with HIV will become very unwell over time.
You cannot get HIV:
It is extremely unlikely that you will get HIV from oral sex although there is a theoretical risk if you have open sores in your mouth.