What causes HIV?

  HIV can be cause by any type of unprotected sex.People can get this when body fluids such as semen or blood from an infected person gets into the body of a person who is not infected. Another way you can get HIV is by "HIV can be spread sexually from a guy to a girl, a girl to a guy, a guy to a guy, and a girl to a girl". http://kidshealth.org/teen/infections/stds/AIDS.html