How long does it take for a 3-year-old child to recover from influenza A virus on its own?

In most cases, children with influenza A will experience high fever, which typically lasts for 5 to 7 days; in physically weaker children, the duration may be even longer. Once influenza A is diagnosed, active treatment can significantly shorten the duration of fever. Besides fever, other symptoms may also occur, such as headache, sore throat, and body aches. Therefore, when a child has a high fever, it's essential to go to the hospital for appropriate evaluation. If influenza A is confirmed, oseltamivir should be taken orally under a doctor's guidance to help prevent disease progression. When oseltamivir is administered within 24 hours of symptom onset, fever usually resolves within three days.