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 vs. Viral Load: What’s in a Number? - Healthline
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.
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
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 …
Understanding Absolute CD4 Count and CD4 Percentage
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 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.
What Do CD4 T Cells Do in the Immune System? - Biology Insights
Jul 25, 2025 · CD4 T cells are a type of white blood cell (lymphocytes) that play a role in the adaptive immune system. These cells are part of the body’s defense mechanisms, identifying …
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 …
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 Test - Purpose, Results, Normal Range, and more
The CD4 test is a vital blood test used to measure the number of CD4 T-lymphocytes (CD4 cells) in the body. CD4 cells are a type of white blood cell essential for immune system function. …