- HIV (human immunodeficiency virus) is a virus that attacks the immune system of the body.
- HIV virus enters the body through sexual contact and spreads to lymph nodes all over the body.
- HIV causes the disease known as AIDS ( acquired immunodeficiency syndrome).
- AIDS is a disorder of the cell-mediated immune system of the body and makes the body weak and susceptible to a variety of infections.
final answer: HIV virus causes AIDS.