What Is the CD4:CD8 Ratio Test Used For? CD4 and CD8 are two types of white blood cells in your blood. White blood cells help your body fight infections. If you have HIV infection, your doctor may use ...
The A/G ratio test measures albumin and globulin levels in your blood. You may need to fast for up to 12 hours before getting the test. If you have a low A/G ratio, it may be a sign of liver disease ...