White Blood Cell Count Test
May 16, 2026
White Blood Cell Count Test
A white blood cell (WBC) count test measures the immune cells in your blood that protect you from infection and disease—including neutrophils (fight bacteria), lymphocytes (fight viruses, immunity), monocytes, eosinophils (allergies, parasites), and basophils—with abnormal counts indicating infection, inflammation, autoimmune conditions, allergies, or blood disorders.
At Blood Test London, WBC testing is included in our full blood count from £245 with results in 2-3 days. A doctor always reviews every result.
Understanding WBC Count
Total WBC Count
Level (×10⁹/L) | Interpretation |
|---|---|
Below 4.0 | Low (leukopenia) |
4.0-11.0 | Normal |
Above 11.0 | High (leukocytosis) |
WBC Differential
Cell Type | Normal Range | Primary Function |
|---|---|---|
Neutrophils | 2.0-7.5 | Bacterial infection |
Lymphocytes | 1.0-4.0 | Viral infection, immunity |
Monocytes | 0.2-0.8 | Cleanup, immunity |
Eosinophils | 0.04-0.4 | Allergies, parasites |
Basophils | 0.01-0.1 | Allergic reactions |
What Abnormal WBC Means
High WBC (Leukocytosis)
Infection (most common)
Inflammation
Allergic reactions
Stress response
Leukaemia (rare)
Low WBC (Leukopenia)
Viral infections
Bone marrow problems
Autoimmune conditions
Medication effects
Chemotherapy
Book Your Test
Price: From £245 (includes full blood count)
Results: 2-3 days
Doctor review: A doctor always reviews every result
Book via WhatsApp | Phone: 020 3951 3429
Blood Test London by The Wellness. WBC testing from £245. A doctor always reviews every result.