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Table 1 Records of epidemic isolate in 8 winters and the compositions of influenza B in northern hemisphere seasonal influenza vaccines, 2010–2018

From: Debate on the compositions of influenza B in northern hemisphere seasonal influenza vaccines

Year HA NA Vaccine strain Lineage
Total VCa YMb Unkc Total VC YM Unk
10/11 794 467 114 213 704 436 102 166 B/Brisbane/60/2008-like VC
11/12 688 197 204 287 567 176 168 223 B/Brisbane/60/2008-like VC
12/13 1208 234 709 265 699 171 458 70 B/Wisconsin/1/2010-like YM
13/14* 584 115 245 224 503 112 219 172 B/Massachusetts/2/2012-like YM
14/15* 1196 109 898 189 849 107 651 91 B/Massachusetts/2/2012-like YM
15/16* 2427 1269 739 419 1948 1098 714 136 B/Phuket/3073/2013-like YM
16/17* 1624 822 652 150 1406 746 599 61 B/Brisbane/60/2008-like VC
17/18* 5575 722 4300 553 4269 623 3483 163 B/Brisbane/60/2008-like VC
  1. aVC, influenza B/Victoria lineage viruses, b YM, influenza B/Yamagata viruses,
  2. cUnk, unknown lineage influenza B viruses
  3. * Only the recommended compositions of influenza B in trivalent influenza vaccines (TIVs) for northern hemisphere seasonal flu were listed
  4. Data updated on September 10, 2019