CD8 Absolute Count
- Sample Type
- Standard
- Fasting
- No
- Unit
- cells/µL
CD8+ T-lymphocytes, or cytotoxic T-cells, are vital for the immune response against intracellular pathogens (viruses) and tumor cells. In a CD4 & CD8 Count panel, the absolute CD8 count is used to assess immune system activation or exhaustion. In HIV monitoring, CD8 counts often rise during the early stages as the body attempts to fight the virus. The ratio of CD4 to CD8 is a critical marker of immune health; an inverted ratio (more CD8 than CD4) is a hallmark of immune senescence and chronic inflammation.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
CD8 counts are highly dynamic and can be transiently elevated by any recent viral infection (like CMV, EBV, or even a common cold), leading to a potentially misleading interpretation of chronic immune dysfunction. Second opinions are vital when absolute counts are used to make long-term prognostic decisions in autoimmune or immunodeficiency contexts.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for CD8 Absolute Count:
Official Sources
Research & Guidelines
- PubMed: CD8 Absolute Count Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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