The white blood cell count is an important part of the blood count and is the most commonly used clinical blood test: the normal value of the total white blood cell count is (3.5-9.5)*10^9/L. When the total white blood cell count is elevated (over 9.5*10^9/L), it is often seen in acute bacterial infections (such as acute tonsillitis, acute appendicitis, pneumonia, urinary tract infections, local abscesses, etc.), a few viral Infections (such as encephalitis B, measles), allergic reactions, after major surgery, burns, acute bleeding, drug poisoning, pesticide poisoning, tumors and blood diseases (such as leukemia), and some patients may also have elevated white blood cells after using certain drugs (leukocyte-elevating drugs, hormones, etc.). Wang Hao, Department of Traditional Chinese Medicine and Rheumatology, China-Japan Friendship Hospital, has decreased total white blood cells (below 3.5*10^9/L), often seen in viral infections (such as influenza, viral hepatitis, etc.), a few bacterial infections (such as typhoid and paratyphoid fever), blood disorders (aplastic anemia, etc.), post-radiation therapy, post-chemotherapy, hypersplenism, etc.