Children usually recover from influenza A virus infection in about two weeks, with individual differences in recovery time ranging from a few days to a few weeks. If symptoms persist or worsen, it is recommended to seek medical attention and follow medical advice. Influenza A is caused by influenza A virus infection, which is mainly spread through droplet transmission, and may also be spread by contact with items contaminated with the virus. Typical symptoms include fever, headache, muscle pain, cough, and malaise. Usually, symptoms such as fever and headache will be relieved relatively quickly, but cough and malaise may last for two weeks or even longer. The use of antiviral drugs such as oseltamivir and zanamivir within one to two days of the onset of symptoms can reduce symptoms and shorten the duration of the illness. It is recommended that you follow your doctor’s advice as to whether or not you need to use the drugs.