Viral pathogenetic testing is required to determine whether influenza is present. If a suspected patient has contact with an infected person during the influenza epidemic season, and also develops fever and respiratory tract infection symptoms, and if viral pathogenetic testing of nasopharyngeal or throat secretions suggests the presence of influenza virus, the diagnosis of influenza can be confirmed. Influenza is usually referred to as influenza A, B, C or A, B, C. It has a pandemic season and is highly contagious; the main manifestations are chills, high fever, headache, dizziness, generalized body aches and pains, etc., and may be complicated by myocarditis, pharyngitis, asthma, sinusitis, etc., and may even be fatal. The main treatment is through drugs, such as oseltamivir, zanamivir and other antiviral drugs, to relieve symptoms and inhibit viral replication. If you have the above symptoms, you should consult a doctor in time, who will give you targeted treatment after clarifying the cause, and do not blindly use your own medication.