Patients with fever and viral infection should do aggressive antiviral treatment against the virus. If the symptoms are not very serious, you can take oral antiviral drugs, such as oseltamivir, ribavirin, acyclovir, etc. You can also take oral Chinese medicine, such as Banlangen and Pediatric Chai Gui Fever Reducing Granules, which have the effect of clearing heat and detoxifying and antiviral. If the symptoms are more severe, treatment can be done with intravenous drip antiviral drugs, such as ribavirin injection. If the body temperature is low, not higher than 38.5℃, you can cool it down by drinking more warm water and applying antipyretic patch. If the fever is high and the body temperature is higher than 38.5°C, antipyretic drugs such as aspirin can be taken to lower the temperature. During fever and viral infection, patients should also pay attention to more rest, ensure sufficient sleep, and also eat more fruits and vegetables to enhance immunity.