Lymphocytes
White blood cells specialized for viral and chronic infections.
What is it
Lymphocytes include T cells, B cells, and natural killer cells. They are the primary responders to viral infection and orchestrate adaptive immunity.
Why it's measured
Lymphocyte count has been used in evaluating viral infection, immune function, and certain blood disorders in research literature.
Reference range
Standard laboratory reference
20 – 45% of WBC
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with viral infection and certain blood disorders in research literature.
Lower
Has been associated with stress, certain medications, and immune suppression in research literature.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Part of standard CBC with differential.
Related markers
Common questions
Lymphocytes include T cells, B cells, and natural killer cells. They are the primary responders to viral infection and orchestrate adaptive immunity.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. Lymphocytes (absolute & %) is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
Lymphocytes (absolute & %) is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Find the right panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.
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