HIV stands for Human Immunodeficiency Virus.  AIDS stands for Acquired Immunodeficiency Syndrome.  A test that is positive for the presence of antibodies to HIV means a person is HIV positive.  If a person is HIV positive and their white blood cell count (aka CD4 count) is less than 200, a person is said to have AIDS.  A normal average white blood cell count is from 900 to 1,200.