Secondary Outcome measure
fever
DISEASE, INFLUENZA, REMISSION, COMPLICATIONS, INFLUENZA

In clinical manifestation, we will record such as time point of fever subside, time point of disease alleviate, degree of disease remission and disappearance rate of individual symptoms;In laboratory examination, we will record the rate of negative conversion of Influenza viral;In treatment, we will record the usage and frequency of antipyretic and analgesic drugs;In outcome, we will record the incidence of complications of influenza.