- Nov 28, 2011
today i got this test result:
HIV-1 Antigen P24 (BS): 0.23
Not detectable
Not dete...

An antigen is any substance that causes your immune system to produce antibodies against it. An antigen may be a foreign substance from the environment such as chemicals, bacteria, viruses, or pollen. An antigen may also be formed within the body, as with bacterial toxins or tissue cells.