Oseltamivir does not prevent pediatric influenza; the drug is used for the prevention of influenza A and B in adults and adolescents 13 years of age and older. Oseltamivir is the name of a Western medicine that is an antiviral medication that can be used to treat influenza A and B in adults and children over the age of 1 year, and it can also be used to prevent influenza A and B in adults and adolescents 13 years of age and older. For children younger than 13 years of age, oseltamivir should not be taken to prevent influenza. It should be noted that some patients may experience adverse reactions such as nausea, vomiting, abdominal pain, and earache while taking oseltamivir. It is contraindicated for those who are allergic to any of the ingredients of this product. To prevent the flu, you can get the flu vaccine, which can significantly reduce the incidence of the flu. Daily also need to maintain good personal hygiene habits, wash hands frequently. If flu symptoms occur, you should take the initiative to self-isolate.