Human Immuno-deficiency Virus
HIV is a virus that attacks and weakens the immune system. As HIV progressively damages these cells, the body becomes more vulnerable to infections, which it will have difficulty in fighting off. It is at the point of a very advanced HIV infection that the person is said to have AIDS. It is important to realize that not all people who are living with HIV have acquired AIDS.
Acquired Immune Deficiency Syndrome
AIDS is the advanced stage caused by the onset of the virus HIV.