What is the white blood cell count?

White blood cells, as a crucial component of the human immune system, play a key role in assessing health status. The normal white blood cell count for adults generally ranges from 4×10^9/L to 10×10^9/L. This value may fluctuate slightly due to individual differences, age, gender, physiological status, and other factors. White blood cells primarily function to defend against invading pathogens, including bacteria and viruses, by engulfing and digesting these harmful substances to protect the body from infection.

An elevated white blood cell count beyond the normal range may indicate the presence of infection, inflammation, stress response, or certain hematologic disorders. Conversely, a decreased count may suggest reduced immunity, viral infection, medication effects, or abnormalities in bone marrow hematopoietic function. Therefore, regular monitoring of white blood cell levels is essential for the timely detection and management of potential health issues. Doctors will comprehensively evaluate the clinical significance of changes in white blood cell counts based on the patient's specific symptoms, physical signs, and laboratory test results, and formulate corresponding diagnostic and treatment plans.