Included with every panel
Baseline labs come free with any panel you build.
Blood & iron
Lymphocytes test
The percentage of lymphocytes, the white cells (T, B, and NK cells) that run your adaptive immune response. Included with every panel.
At a glance
In about 5 days
Most results are ready in about 5 days. Some specialty markers can take up to 21 days.
Check before your draw
This marker has no preparation tag, but it can still need preparation. Contact us before your draw if you’re not sure.
Walk in at Quest
Your lab order arrives by email. Most Quest locations take walk-ins, so bring it with a photo ID.
What it measures
Lymphocytes are the white blood cells that fight viruses, make antibodies and remember germs your body has met before. This shows what share of your white cells they make up.
Why it matters for women
Autoimmune conditions, where the immune system attacks the body by mistake, are more common in women, and one of them, lupus, can lower lymphocytes. Viral infections such as mono can raise them for a while. In pregnancy their share can look lower simply because other white cells rise.
You might check it if…
- you’ve had a viral illness that’s been slow to clear
- you get infections often
- a doctor mentioned lupus or another autoimmune condition
- you’ve had a sore throat, swollen glands and deep tiredness
What your result may mean
High Lymphocytes: what it may mean
A high lymphocyte percentage can go along with viral infections such as mono and some long-lasting immune conditions. This is a share, so it can also look high when neutrophils fall, and the absolute lymphocyte count may tell a clinician more. A recent cold or flu can keep it up for a while as you recover. A sore throat, swollen glands or tiredness can come with it. If the share stays high once you're well, a clinician may look more closely at your blood count.
Low Lymphocytes: what it may mean
A low lymphocyte percentage can follow a sudden illness, steroid use or immune suppression, and it may raise infection risk. In pregnancy the share can look lower simply because other white cells rise. A bacterial infection can do the same by lifting neutrophils. Lupus can lower lymphocytes too, and it can be more common in women. A low share with a normal absolute lymphocyte count may matter less, so a clinician may read the two together.
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These notes provide context and do not diagnose a condition. Not yet available in NY, NJ, RI, HI, ND, SD or WV.