The most common cause of influenza fever is a viral infection. Blood tests will indicate lower than normal white blood cells, increased monocytes, and either elevated or decreased lymphocytes. Viral antibodies can be positive, and lung CT sometimes indicates interstitial changes. Bilateral lung auscultation may be normal, or dry or wet rales may be heard. The diagnosis of viral infection requires the use of antipyretic, detoxifying or antiviral medications, commonly used antipyretic and detoxifying medications, including Le Qing Kai Ling, Pu Di Lan, and Four Seasons Cold and Flu Capsules. Commonly used antiviral drugs, including oseltamivir, Abidor, etc. Viral infections can easily induce combined bacterial infections, if patients have combined bacterial infections, while the need to use antibiotics for treatment, commonly used antibiotics including cefixime, amoxicillin, azithromycin.