Recently, many people are very concern about the increase of people getting HIV/AIDS, especially on the starting age.
Many funds are now started to educate people more about this virus. (My area target group age is 15~24).
It seems most/mainly people get this virus through unprotected intercourse.
So I visit one of the website, AVERT (www.avert.org) to get some info.

These are the main ways in which someone can become infected with HIV:
·unprotected penetrative intercourse who someone
who is infected.
·Injection or transfusion of contaminated blood or
blood products, donations of semen (artificial
insemination), skin grafts and organ transplants
taken from someone who is infected.
·From a mother who is infected to her baby; this
may be during the course of pregnancy, at birth
and through breast-feeding.
·Sharing unsterilised injection equipment that has
been previously used by someone who is infected.