<prompt> Dose of oseltamivir in a child aged 9 months is:2mg kg twice daily for 5 days2.5 mg kg twice daily for 5 days3 mg kg twice daily for 5 days3.5 mg kg twice daily for 5 days  <response>: Age groups Recommended dose of oseltamivir 0 to 1 month 2mg kg twice daily for 5 days 1 month to 3 months 2.5mg kg twice daily for 5 days 3 months to 12 months 3mg kg twice daily for 5 days Ref: Park 21st edition, page 148 Chapter: Epidemiology in communicable diseases. 