What is the cause of leucocyte low after fever

After a fever, check the white blood cell value is low, usually caused by viral infection, such as respiratory syncytial virus, adenovirus, influenza virus, etc. Secondly, fever appears low white blood cells, and may be affected by drugs, such as common antipyretic drugs. In addition, when suffering from aplastic anemia, acute leukemia, systemic lupus erythematosus, lymphoma and other diseases, there will also be fever white blood cell reduction phenomenon.