A/ Solomon Islands/ 3/ 2006 (H1N1) like strain (A/ Solomon Islands/ 3/ 2006, IVR-145) A/ Wisconsin/ 67/ 2005 (H3N2) like strain (A/ Wisconsin/ 67/ 2005, NYMC X161B) B/ Malaysia/ 2506/ 2004 like strain (B/ Malaysia/ 2506/ 2004)