This document provides information about HIV and AIDS, comparing and contrasting the two. It states that HIV is a virus that attacks and kills white blood cells over time, eventually leaving the body unable to fight infection and disease, which is known as AIDS. It describes HIV as causing AIDS and that AIDS represents advanced HIV disease. The document also outlines various modes of HIV transmission including unprotected sex, contaminated blood or needles, and from mother to baby. It notes HIV is not spread through casual contact. Testing options and the stages of HIV infection are also summarized.