How do you get HIV? HIV can be passed on when infected bodily
fluid, such as blood or semen, is passed into an uninfected
person. Semen is the liquid which is released from a man's penis
during sex which carries sperm. It can be infected with HIV or
AIDS when someone is HIV positive or is carrying the AIDS virus.
This can happen during unprotected sex. For example when two
people have sex without using a condom when one partner is
already infected, or between drug users who inject and share
needles. It can't be transmitted by things like coughing,
sneezing, kissing, sharing a toilet seat, swimming pools, sweat
and tears.