Whether white blood cells below 2.0 are dangerous after a cold should be analyzed specifically according to the patient’s condition. Colds are often called upper respiratory tract infections and are commonly caused by viral or bacterial infections, but those who are found to have lowered white blood cells should be analyzed according to the following conditions: 1. Patients without immunodeficiency and without other serious complications or underlying diseases, the cause of lowered white blood cells caused by colds is often viral infections, which can be treated with antiviral drugs and other symptomatic treatments according to the doctor’s recommendation after completing the relevant examinations and making a clear diagnosis, and the white blood cells can return to normal after the infection has been cured. 2. Immunodeficient people, or people with other underlying diseases are relatively dangerous, due to poor immunity and other basic conditions of their own, combined with infections, leukocyte lowering may lead to the aggravation of the original underlying diseases, infections caused by the prolongation of life-threatening complications such as infectious shock, should be given sufficient attention, timely consultation. Tips: When abnormal blood counts are detected, they should be taken into consideration of your own situation and treated promptly according to the doctor’s advice.