10-13 years normally.
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Answer: Between 1,000 and 11,000.
Explanation: The normal white blood cell count in a healthy adult is between 4,000 and 11,000 WBCs per microliter or cubic millimeter (mm3) of blood, but this may be different between males and females, as well as healthy children and other young people due to the possibility that they usually have more.
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