Is 21 a high wbc in a 5year old?

A white blood cell (WBC) count of 21,000 cells per microliter in a 5-year-old is considered elevated, as the normal range typically falls between 5,000 and 15,000 cells per microliter. An elevated WBC count can indicate an infection, inflammation, or other medical conditions. It's important to consult a healthcare professional for proper evaluation and diagnosis if a child's WBC count is high.