This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Newer Influenza vaccine -a)  Split-virus vaccineb)  Neuraminidase c)  Live attennuated vaccined) Killed vaccine \nSelect and explain. \nA. ac, B. a, C. ad, D. ab', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Prevention of influenza \n1. Immunization\nThree types of vaccines are available :\na) Killed vaccine -\xa0most commonly used \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0\nb) Live attenuated - Administered as nasal drops\nc) Newer vaccines - Split virus vaccine (sub-virion vaccine)\n\nUsed subcutaneously\n\n\nRecombinant vaccine\nNeuraminidase vaccine\n\n\nA trivalent, live attenuated influenza vaccine administered as a single dose intranasal spray is a effective as inactivated vaccine. It is approved for use in otherwise healthy individuals between the age of 2 years and 49 years.\n\n2. Chemoprophylaxis\n\nType A →\xa0Amantadine and rimantidine\nBoth Type A & B\xa0→ Zamamivir, Osteltamivir\nThe current recommendations are that influenza A be treated with zanamivir or a combination of oseltamivir and rimantadine. Influenza B can be treated with either oseltamivir or zanamivir.\nFor chemoprophylaxis against influenza A, Zanamivir should be used. If this is contraindicated, rimantidine should be given. For influenza B, oseltomivir is used.\n\nFollowing information has been added in 22nd /e of Park\n\n\nOseltamivir is the drug of choice for chemoprophylaxis of influenza A (H1N1) 2009 for health care personnel’s and close contacts of suspected, probable or confirmed case of pandemic influenza A (H1N1) 2009.', 'role': 'assistant'}]