For clinicians

White blood cells

Unit: /μL

What is White blood cells?

White blood cells are your body's defence force, patrolling for infections and clearing away damage. The number rises and falls as your immune system responds to everyday life. A value within range points to an immune system that is calm and ready.

What moves this value?

A recent infection, stress, smoking and even intense exertion can make the number fluctuate temporarily.

Good sleep, not smoking and recovery after illness help keep your defence in balance. Discuss a strongly unusual value with your doctor.

The colour zones are personal: they depend on age, sex, risk and history, and appear in the patient's own report.

Insights to discuss with the patient, not a diagnostic instrument.

Developed and reviewed with the Synapse medical advisory board.