The proportion of all T cells that are CD8 cells.
CD8 cells are also called cytotoxic T-lymphocytes. They help fight cancer and germs that live inside your cells (intracellular pathogens).
The CD8 percentage is sometimes more reliable than the absolute count of CD8 because it tends to vary less.
CD 8
CD 8
Every lab result you’ve ever had, charted and explained.
Healthmatters is a tracker for your lab results. Upload a report from any lab, any country — every marker charted and explained.
Start with my report →Beyond CD 8 — 10,000+ markers explained
One CD 8 result tells you where you are. Your history tells you where you’re heading. Upload your past lab reports and see this marker — and every marker on them —every marker charted against your own lab’s ranges.
Start with this report →
Clinical Sources & References
All our content is backed by peer-reviewed studies, academic research, and trusted medical sources. We’re committed to accuracy and transparency — see our editorial policy for details.
Article Review Log
Written by
Healthmatters Editorial Team