Influenza A symptoms in children may go away after about 2 weeks of regular treatment. Influenza A is an acute infectious disease of the respiratory system. If children have influenza A, the main symptoms include fever, cough, headache, sore throat, body aches and fatigue, etc. Generally, the symptoms will worsen in a week or so, and these symptoms may disappear in 2 weeks or so after routine antiviral treatment with oseltamivir and other medications under the guidance of a doctor. If a child has influenza A combined with pneumonia, myocarditis, etc., the treatment time will be longer and the symptoms will disappear slower, which usually varies from person to person. If children have influenza A, it is recommended that they go to a regular hospital as soon as possible and receive active antiviral treatment to prevent their condition from worsening.