High mononuclear cell percentage and fever alone belong to viral infectious diseases, to find out what kind of virus is caused, and to combine with the child’s clinical symptoms for etiologic treatment. The treatment of monocytes and fever is as follows: 1, monocytes need antiviral treatment, antiviral treatment can be oral antiviral drugs, or intravenous infusion of antiviral drugs for treatment. 2, the baby’s fever should be based on the temperature of the high and low, the treatment of different drugs, the body temperature between 37.4-38.1 ℃ is a low fever, the state of low fever can be given to the child to drink more water, with the physical cooling treatment. 3, the body temperature is greater than or equal to 38.5 ℃ or 38.5 ℃, or with the physical cooling treatment. 3, body temperature greater than or equal to 38.5 ℃ or higher temperature, parents are advised to give the child oral antipyretic drugs with physical cooling. 4, such as oral medication with physical cooling, the child’s temperature did not fall but increased the situation, then need to be in the hospital under the guidance of the doctor for further examination and treatment.