What is the normal range for white blood cell count?
Generally speaking, the normal white blood cell count is 3.5–9.5×10^9/L for adults, 15–20×10^9/L for infants, and 5–12×10^9/L for children. A detailed analysis is as follows:

White blood cells are important cellular components in the blood and a crucial part of the body's immune system, responsible for defending against external pathogens. They mainly consist of five types: lymphocytes, neutrophils, monocytes, eosinophils, and basophils. White blood cell count is a key indicator in routine blood tests, primarily used to screen for acute bacterial infections, tissue damage, leukemia, aplastic anemia, and other conditions. Under normal circumstances, the white blood cell count should be 3.5–9.5×10^9/L in adults, 5–12×10^9/L in children, and 15–20×10^9/L in infants. If the white blood cell count falls below the normal range, it may indicate bacterial or viral infections; if the count exceeds the normal range, it could suggest conditions such as aplastic anemia or leukemia.
In daily life, it is important to develop good living habits, maintain a light diet, and avoid staying up late, all of which help enhance the body's immunity and maintain normal white blood cell levels.