<prompt> Newer Influenza vaccine -a Split-virus vaccineb Neuraminidase c Live attennuated vaccined Killed vaccineacaadab  <response>: Prevention of influenza 1. ImmunizationThree types of vaccines are available :a Killed vaccine - most commonly used b Live attenuated - Administered as nasal dropsc Newer vaccines - Split virus vaccine sub-virion vaccineUsed subcutaneouslyRecombinant vaccineNeuraminidase vaccineA 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.2. ChemoprophylaxisType A Amantadine and rimantidineBoth Type A B Zamamivir, OsteltamivirThe 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.For chemoprophylaxis against influenza A, Zanamivir should be used. If this is contraindicated, rimantidine should be given. For influenza B, oseltomivir is used.Following information has been added in 22nd e of ParkOseltamivir is the drug of choice for chemoprophylaxis of influenza A H1N1 2009 for health care personnels and close contacts of suspected, probable or confirmed case of pandemic influenza A H1N1 2009. 