Fever 39 ℃ white blood cells lymphocytes neutrophils are low, should be selected according to the cause of the antiviral, anti-bacterial, elevation of white blood cells and other treatments, including: 1. viral infection: severe viral infection triggered by high fever, blood routine will show the performance of the above tests are lowered, commonly used antiviral drugs, including oseltamivir, ribavirin and so on. 2. Severe bacterial infections: such as severe cold patients can also cause high fever and a decrease in white blood cells, lymphocytes, neutrophils, commonly used drugs include moxifloxacin, cefoperazone and so on. 3. Blood diseases: If the low white blood cells and fever are caused by blood diseases, the treatments include chemotherapy drugs and bone marrow transplantation. In addition to the above, there are many other reasons that can cause fever, low white blood cells, lymphocytes and neutrophils. It is recommended to go to the hospital in time, complete the relevant examinations, clarify the cause of the disease, and then give targeted treatment. Blind self-medication should be avoided.