In molecular biology, CD4 (cluster of differentiation 4) is a glycoprotein that serves as a co-receptor for the T-cell receptor (TCR). CD4 is found on the surface of immune cells such as …

Apr 15, 2025 · A CD4 count tells a provider how many T-cells are in a small amount of blood. Providers use the results to stage HIV infections and monitor antiretroviral therapy.

Jul 18, 2013 · For people with HIV, CD4 count and viral load are important indicators of health status. Learn what they measure and how they affect HIV treatment plans.

Nov 11, 2024 · The CD4 count is a test that measures how strong your immune system is. Find out how it helps your doctor make HIV and AIDS treatment decisions.

Dec 19, 2025 · The CD4 percentage shows what part of your white blood cells are CD4 cells and helps check how strong your immune system is. A CD4/CD8 ratio greater than 1 means a …

CD4 cells are a type of white blood cell that circulates throughout the body in the blood. They're also called CD4 T lymphocytes or "helper T cells." That's because they help fight infection by …

Learn about CD4 T-cell count, its role in immune health, normal ranges, and its significance in HIV monitoring. Understand CD4 count tests, low CD4 symptoms, and treatment insights.

Aug 5, 2025 · CD4 counts are measured through a blood test, using a technique called flow cytometry. This test provides a snapshot of the immune system’s strength. For an adult …

Jul 24, 2023 · A CD4 count measures how many CD4 cells are in a person’s blood. CD4 cells help fight infections. A CD4 count can check how well a person’s immune system is working.

May 1, 2023 · CD4 T cells are human helper T cells that express cluster determinant 4 (CD4) molecules. The CD4 molecule is a member of the immunoglobulin family and primarily …