Whether a white blood cell count of 24.8 x 10⁹/L is serious or not is determined by the cause of the elevated white blood cells. Normal values are adults (4-10) × 10⁹/L, children (5-12) × 10⁹/L, and newborns (15-20) × 10⁹/L. 24.8 × 10⁹/L for either age group are elevated. Elevated white blood cell counts, which are mainly influenced by neutrophils, can be seen in reactive and primary increases. 1. Reactive increase: If the reactive increase is caused by infection, tissue injury, acute blood loss, poisoning, etc., it is necessary to actively deal with the triggering cause, and can be returned to normal after the primary cause is solved. For example, levofloxacin should be given as anti-infection treatment. 2. Primary increase: it is mostly suggested that the disease of hematopoietic system is more serious, such as acute and chronic leukemia, myelodysplastic syndrome, etc. If the disease is not treated in time, it can be restored to normal. If the patient does not receive timely treatment (cytarabine, etc.), the rapid progression of the disease can be life-threatening. When a white blood cell count of 24.8×10⁹/L is present, it is important to actively search for the cause and actively treat the disease under the guidance of a physician.