<prompt> Dose of oseltamivir for chemoprophylaxis in an infant is:-3 mg kg once daily20 mg once a day20 mg twice a day20 mg thrice a day  <response>: Oral oseltamivir for treatment of influenza Age Weight Dose Frequency Duration 1yr 3mg kg Twice daily 5 days 1yr 15kg 30mg 15-23kg 45mg 23-40kg 60mg 40kg 75mg Oral oseltamivir for Chemoprophylaxis 3 months-1yr 3mg kg once daily 7 days 1yr 15kg 30mg 15-23kg 45mg 23-40kg 60mg 40kg 75mg 