This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'Treatment of choice for seasonal influenza is \nSelect and explain. \nA. Oseltamivir, B. Zanamivir, C. Peramavir, D. Amantadine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Early treatment of hospitalized adult influenza patients with oseltamivir has been repoed to reduce death in some observational studies. Clinical benefit is greatest when antiviral treatment is administered early, especially within 48 hours of influenza illness onset in clinical trials and observational studies Ref Harrison20th edition pg 980', 'role': 'assistant'}]