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Immunology

CD4 T-cells (%)

The share of your lymphocytes that are CD4 helper T-cells, the population that coordinates the rest of the immune response.

Unit %Typical adult range 35–55 %
What it is

The share of your lymphocytes that are CD4 helper T-cells, the population that coordinates the rest of the immune response.

Why it matters

The percentage is more stable than the absolute count, so it is the better of the two to chart over years.

Reading the number

It is a percentage of lymphocytes, not of all white cells, so it moves when the differential moves. Read it with the absolute count from the same sample.

What moves it
recent infectionsteroid medicationtime of daystress
Read alongside
CD4 T-cells (absolute)CD4/CD8 ratioLymphocytes
When to raise it

Worth discussing a sustained fall across several tests.

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 CD4 T-cells (%).

T4 [CD3/CD4]CD4T4 CD3/CD4CD4 %

Track your cd4 t-cells (%) over time.

CD4 T-cells (%) 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.

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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.