Influenza is an acute respiratory infectious disease caused by influenza virus infection, which can be generally classified as influenza A and influenza B. Since it is a viral infection, the blood tests are mostly consistent with viral infection, i.e. most of them will show a lower white blood cell count. Influenza symptoms are generally mild and do not require treatment, and are self-limiting, recovering in about 5-7 days. However, for the elderly and infirm, such as the elderly, children, and those with underlying diseases such as diabetes, coronary heart disease, and chronic obstructive pulmonary disease, active treatment is required to avoid serious complications and anti-influenza virus treatment should be actively given, commonly used drugs include oseltamivir phosphate. Symptomatic treatment should be given according to the symptoms. When the body temperature is high, ibuprofen or diclofenac sodium can be given to reduce fever, and body fluids should be replenished in time, and those with severe symptoms should seek medical attention in time. As the virus is cleared from the body, the clinical symptoms will gradually subside and the white blood cell count will gradually return to normal.