If a patient has a persistent low fever, he or she can be treated by the following methods: 1. take Bupropion oral solution, with oseltamivir and other antiviral drugs for antiviral treatment, because the flu is a viral infection caused by the upper respiratory tract infectious diseases, the symptoms of low fever will gradually subside after the virus subsides. 2. put on antipyretic paste to relieve the discomfort caused by low fever, and at the same time, you need to drink more warm water The patient should drink more warm water to promote blood circulation and accelerate the metabolism of the virus, so that the flu disease will improve as soon as possible. The patient’s room should be opened regularly to keep the air fresh. 3, if the flu combined with bacterial infection causes persistent low fever, you need to take cefuroxime and other antibiotics for treatment. It takes 3-7 days for the persistent low fever of influenza to gradually improve, during which you need to keep sufficient rest and supplement nutrition.