Blood Donation and White Blood Cell Counts: Temporary Changes
Donating ~450–470 mL blood causes transient WBC changes:
- Immediate drop in total WBCs due to volume loss.
- Neutropenia: Neutrophils drop 20–30%, recover in days.
- Lymphocytes: Slight reduction, normal within a week.
- Recovery: Bone marrow ramps up production.
- Immune function: Remains competent; no increased infection risk from single donation.
- Long-term: Regular donation may slightly lower counts, not clinically significant.
Blood donation is safe; WBC fluctuations are temporary and benign.
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