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Immunology

CD8 T-cells (absolute)

How many CD8 cytotoxic T-cells are circulating in each microlitre of blood.

Unit /µLTypical adult range 190–725 /µL
What it is

How many CD8 cytotoxic T-cells are circulating in each microlitre of blood.

Why it matters

It is the denominator half of the CD4/CD8 ratio, and a persistent rise is what usually pushes that ratio down.

Reading the number

Like the CD4 count it is derived from three numbers and inherits the scatter of all three. Compare samples taken at similar times of day.

What moves it
recent viral infectiontime of dayagerecent intense exercise
Read alongside
CD8 T-cells (%)CD4 T-cells (absolute)CD4/CD8 ratio
When to raise it

Worth discussing a sustained rise alongside the CD4 count.

Tracking only, not a diagnosis. The range above is a typical adult reference range — the range printed by the lab that ran your test is the one that applies to you. Discuss anything that concerns you with your doctor.

Also known as

On a report in another language.

A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under CD8 T-cells (absolute).

T8 [CD3/CD8] absolutoCD8 absolutoCD8 count

Track your cd8 t-cells (absolute) over time.

CD8 T-cells (absolute) is one of 165 analytes Vitals Vault charts over time. Import a lab report in any language and this number lands on a timeline only you can read.

Continue with Google
Tracking only. This app is not medical advice. Always discuss results and future analysis with your doctor.

Catalog entry last updated 2026-08-28. Browse all 165 metrics.