There are two general tests that detect HIV infection. Because HIV lives in blood cells, both are tests conducted on human blood, although tests using saliva and urine are expected soon. One blood test detects evidence of the virus itself; the other detects the antibody to the virus.     Tests for HIV-Three tests for HIV [...] expressmedscanada.com

In addition to the physician-of-record, the residents, and the fellows, the other physicians you will see in a hospital are the specialist physicians. Because AIDS affects so many different parts of the body, and because it takes so many forms in so many different people, no single physician can treat all aspects of the disease. [...]