CD4 - Wikipedia
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 …
CD4 Count: Normal Range, vs. Viral Load, and What it Means for …
Jul 18, 2013 · A low CD4 count indicates a weakened immune system and a higher risk of infection, while a high viral load means there are many copies of HIV in the blood.
CD4 Cell Count (T-Cell Test): Results & Normal Range
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.
CD4 Lymphocyte Count: MedlinePlus Medical Test
What is a CD4 count? A CD4 count is a blood test that measures the number of CD4 cells in a sample of your blood. CD4 cells are a type of white blood cell that circulates throughout the …
CD4 T Helper Cells: Types and Functions - Verywell Health
Dec 16, 2025 · CD4 T helper cells are crucial because they trigger the body's immune response to fight off infections and diseases.
CD4 Count, HIV, and AIDS: Test and Results and What They Mean
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.
CD4+ Count Test - Kaiser Permanente
Sep 25, 2025 · A CD4+ count is a blood test to see how well the immune system is working in people who have been diagnosed with HIV. CD4+ cells are a type of white blood cell.
What Are CD4+ Cells and Why Is the Count Important?
Jul 28, 2025 · CD4+ cells are a specific type of white blood cell, also known as T lymphocytes, that play a central role in the body’s immune system. Often called “helper T cells,” they …
Understanding CD4 T-Cell Count: Test, Range, and Importance
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.
CD4 + T Cells: Differentiation and Functions - PMC
CD4 + T cells are crucial in achieving a regulated effective immune response to pathogens. Naive CD4 + T cells are activated after interaction with antigen-MHC complex and differentiate into …