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CD4 (%) details
What CD4 (%) shows
This measures the percentage of your total lymphocytes that are CD4 'helper' T-cells, used alongside the absolute CD4 count to assess immune function, particularly in HIV monitoring. The percentage can be a more stable measure than the absolute count in some situations, since it's less affected by day-to-day fluctuations in total white blood cell numbers, and is sometimes preferred for tracking children's immune status. Like the absolute count, a declining percentage suggests weakening immune function, while stable or rising percentages on treatment reflect immune recovery.
Tests that include CD4 (%)
The CD4:CD8 Ratio Profile measures the percentage and absolute counts of CD4+ and CD8+ cells, along with their ratio. This test is valuable for assessing and monitoring immune system function, as changes in these cell counts and ratios can indicate alterations in immune status.
Biomarkers
- Basophils (%) The percentage of your white blood cells that are basophils, a cell type involved in allergic and inflammatory responses.
- CD4/CD8 Ratio Compares two types of immune T-cells. Used to assess immune system balance, especially in HIV monitoring and some autoimmune or infectious conditions.
- Eosinophils (%) The percentage of your white blood cells that are eosinophils, elevated with allergies, asthma, or parasitic infections.
- Hematocrit The percentage of your blood volume made up of red blood cells. Used to help diagnose anemia or polycythemia (excess red blood cells).
- Hemoglobin The oxygen-carrying protein in your red blood cells. A core marker for diagnosing anemia and other blood disorders.
- Immature Granulocytes (%) The percentage of young, not-yet-mature white blood cells in circulation — a rise can be an early sign of infection or bone marrow stress.
- Lymphocytes (%) The percentage of your white blood cells that are lymphocytes, key immune cells including T-cells, B-cells, and NK cells.
- Monocytes (%) The percentage of your white blood cells that are monocytes, cells that help fight infection and clear damaged tissue.
- Neutrophils (%) The percentage of your white blood cells that are neutrophils, a first-line defense against infection.
- Absolute CD4+ Cells Counts CD4 'helper' T-cells, a key part of your immune system. Widely used to monitor immune health in HIV and other immune conditions.
- Absolute CD8+ Cells Counts CD8 'cytotoxic' T-cells, immune cells that help destroy infected or abnormal cells. Used to assess immune status.
- Basophils The number of basophils, a type of white blood cell involved in allergic and inflammatory responses, in your blood.
- CD4 (%) The percentage of your lymphocytes that are CD4 helper T-cells, used alongside the absolute CD4 count to assess immune function.
- CD8 (%) The percentage of your lymphocytes that are CD8 cytotoxic T-cells, used alongside the absolute count to assess immune function.
- Eosinophils The number of eosinophils, a white blood cell type involved in allergic reactions and parasite defense, in your blood.
- Immature Granulocytes The number of young, not-yet-mature white blood cells in circulation — a rise can be an early sign of infection or bone marrow stress.
- Lymphocytes The number of lymphocytes, white blood cells central to your immune response (including T-cells, B-cells, and NK cells), in your blood.
- Mean Corpuscular Hemoglobin Concentration (MCHC) Mean Corpuscular Hemoglobin Concentration — the average concentration of hemoglobin within your red blood cells, used to help classify types of anemia.
- Mean Corpuscular Hemoglobin (MCH) Mean Corpuscular Hemoglobin — the average amount of hemoglobin per red blood cell, used to help classify types of anemia.
- Mean Corpuscular Volume Mean Corpuscular Volume — the average size of your red blood cells, a key value used to help determine the cause of anemia.
- Monocytes The number of monocytes, white blood cells that help fight infection and clear damaged cells, in your blood.
- Neutrophils The number of neutrophils, the most abundant white blood cell type and a first-line defense against infection, in your blood.
- Platelet Count Cell fragments that help your blood clot. Counted to screen for bleeding or clotting risk and various blood disorders.
- Red Blood Cell Count (RBC) Red blood cell count — the number of oxygen-carrying red blood cells in your blood, used to help diagnose anemia or polycythemia.
- Red Cell Distribution Width (RDW) Red Cell Distribution Width — measures how much your red blood cells vary in size, helpful for narrowing down the cause of anemia.
- White Blood Cell Count (WBC) White blood cell count — the total number of white blood cells in your blood, key immune cells. Used to help detect infection, inflammation, and other blood disorders.
T-lymphocyte count assists in evaluating cellular immunocompetency.
Biomarkers
- CD4/CD8 Ratio Compares two types of immune T-cells. Used to assess immune system balance, especially in HIV monitoring and some autoimmune or infectious conditions.
- Absolute CD19+ Cells Counts the number of CD19+ B cells per volume of blood, the immune cells that make antibodies, used to assess immune system health.
- Absolute CD3+ Cells Counts the number of CD3+ T cells per volume of blood, the main immune cells that direct and carry out immune responses, to assess immune health.
- Absolute CD4+ Cells Counts CD4 'helper' T-cells, a key part of your immune system. Widely used to monitor immune health in HIV and other immune conditions.
- Absolute CD8+ Cells Counts CD8 'cytotoxic' T-cells, immune cells that help destroy infected or abnormal cells. Used to assess immune status.
- CD19 (B Cells) (%) Shows CD19-positive B cells as a percentage of your lymphocytes, helping assess the antibody-producing part of your immune system.
- Mature T Cells (CD3) (%) Shows CD3-positive mature T cells as a percentage of your lymphocytes, helping assess the T cell part of your immune system.
- CD4 (%) The percentage of your lymphocytes that are CD4 helper T-cells, used alongside the absolute CD4 count to assess immune function.
- CD8 (%) The percentage of your lymphocytes that are CD8 cytotoxic T-cells, used alongside the absolute count to assess immune function.
- Lymphocytes The number of lymphocytes, white blood cells central to your immune response (including T-cells, B-cells, and NK cells), in your blood.
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