White Blood Cell Count
Track White Blood Cell Count for immune system function and infection response assessment. Monitor your bodys primary defense markers.
What is White Blood Cell Count?
White blood cell count (WBC) measures the total number of white blood cells per microliter of blood. White blood cells are immune system cells that defend your body against infections, foreign substances, and abnormal cells.
Why is it Tested?
Doctors order WBC count to diagnose infections, monitor immune system function, assess bone marrow disorders, evaluate inflammatory conditions, and monitor treatment response. It’s a key component of the complete blood count (CBC).
Normal Ranges
Reference ranges for white blood cell count:
- Normal: 4.5–11.0 × 10³/µL
Values may vary slightly with age, with children typically having higher counts than adults.
Reference ranges vary by authority. Track yours across multiple standards with automatic unit conversions in LabsVault.
What do Abnormal Results Mean?
Abnormal results are not a diagnosis. Always discuss your results with a qualified healthcare provider before making any medical decisions.
Low WBC Count (Leukopenia)
Reduced counts may indicate:
- Viral infections
- Bone marrow disorders
- Autoimmune conditions
- Certain medications (chemotherapy)
- Nutritional deficiencies
- HIV/AIDS
High WBC Count (Leukocytosis)
Elevated counts suggest:
- Bacterial infections
- Inflammatory conditions
- Blood cancers (leukemia, lymphoma)
- Physical or emotional stress
- Smoking
- Certain medications
How to Track Over Time
WBC count trends help monitor infection progression, treatment effectiveness, and immune system health. Rising counts during illness may indicate worsening infection or immune response, while declining counts may suggest resolution or treatment success.
Track your White Blood Cell Count results over time
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