At month @ , haemagglutination inhibition antibody seroprotection rates were @ % ( @ % CI @ % to @ % ) for @xH@N@-AS , @ % ( @ % CI @ % to @ % ) for @xH@N@-AS , @ % ( @ % CI @ % to @ % ) for @xH@N@ , and @ % ( @ % CI @ % to @ % ) for @xH@N@ .