Influenza A viruses:1Reassortants of A/Leningrad/134/17/57 (H2N2) master donor virus (MDV) with A/Nanchang/933/95 (H3N2), A/Beijing/262/95 (H1N1), A/Perth/13/95 (H1N1), A/Johannesburg/82/96 (H1N1), A/Panama/2007/99 (H3N2), A/New Caledonia/20/99 (H1N1)2Reassortants of A/Leningrad/134/17/57 (H2N2) MDV with A/Wellington/01/04 (H3N2), A/Malaysia/01/04 (H3N2), and A/Brisbane/10/07 (H3N2).Influenza B viruses:3Reassortants of B/USSR/60/69 MDV with B/Harbin/07/94, B/Shandong/7/974Reassortants of B/USSR/60/69 MDV with B/Florida/4/06, B/Brisbane/3/07, B/Bangladesh/1994/10, and B/Wisconsin/1/10