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 helper T cells, …
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 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 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.
Understanding Absolute CD4 Count and CD4 Percentage - Verywell …
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 healthy immune …
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 triggering …
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 specific …
Understanding CD4 T-Cell Count: Test, Range, and Importance
What is a CD4 T-Cell Count? A CD4 T-cell count measures the number of CD4 T-cells in a microliter of blood. These white blood cells are vital for activating other immune cells to fight infections, making …
Where Is the Protein CD4 Found in the Body? - Biology Insights
Jan 8, 2026 · The presence and location of CD4 are fundamental to the body’s adaptive immune response, influencing how the immune system coordinates its defense mechanisms. Understanding …
CD4 count blood test: What it is and what to expect - Medical News …
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.