**NOTE: All laboratory testing requires an authorizing physician in order to complete the laboratory testing**
This test looks at the ratio of two important types of white blood cells in your blood. Lymphocytes are a type of white blood cell in your immune system. This test looks at two of them, CD4 and CD8. CD4 cells lead the fight against infections. CD8 cells can kill cancer cells and other invaders.
The ratio indicates how strong your immune system is and helps predict how likely you are to develop a crippling infection.
In addition to HIV/AIDS, conditions that can be monitored with this test include infectious mononucleosis and other viral infections, chronic lymphocytic leukemia, Hodgkin disease, aplastic anemia, and neurological disorders like multiple sclerosis and myasthenia gravis.