Pediatric influenza, or flu, the main symptoms are sudden onset of high fever, headache, body aches, fatigue and cough, sore throat and other respiratory symptoms. The main symptoms of pediatric influenza are sudden onset of illness, fever, chills, headache, limb muscle aches and pains, tiredness and fatigue, gradual emergence of respiratory symptoms such as cough, sore throat, ocular conjunctival congestion, cheek flushing, and katydid symptoms signs are not as pronounced as the common cold, sore throat, pharyngeal redness and swelling and tonsil signs are not as serious as acute tonsillitis, as the clinical characteristics of influenza. Most of the peripheral white blood cell counts are low or normal, and neutrophils are reduced significantly, which is clinically suspicious of influenza, and infants and young children are not easy to distinguish from other upper respiratory tract viral infections based on the clinical manifestations, and should be diagnosed pathogenetically as early as possible.