Can fever cause leucocyte low?

There are many causes of leukopenia, and the main causes of leukopenia are gram-negative bacterial infection with typhoid fever, paratyphoid fever, viral infection such as influenza virus infection, parasitic infection with malaria, etc. Some blood diseases such as aplastic anemia, granulocytosis, leukopenia, etc., as well as autoimmune diseases such as systemic lupus erythematosus, leukopenia caused by immune antibodies and other physical and chemical causes, or leukopenia caused by drug reactions may also be accompanied by fever. Other factors to consider are cirrhosis, hypersplenism, etc., and comprehensive examination is recommended to find out the cause and targeted treatment.