Table 3.
Circulating influenza viruses in Emilia-Romagna vs vaccine strains from 2010-2011 to 2017-2018 season (Predominant strain is indicated in bold; mismatch is highlighted)
| Season | Trivalent vaccine composition (vaccine strains) | Circulating influenza viruses | ||||
| A/H1N1pdm09 | A/H3N2 | B (lineage) | A/H1N1pdm09 | A/H3N2 | B (lineage) | |
| 2010-2011 | A/California/7/2009 | A/Perth/16/2009 | B/Brisbane/60/2008 (VIC) | A/H1N1pdm09 | VIC | |
| 2011-2012 | A/California/7/2009 | A/Perth/16/2009 | B/Brisbane/60/2008 (VIC) | A/H3N2 | ||
| 2012-2013 | A/California/7/2009 | A/Victoria/361/2011 | B/Wisconsin/1/2010 (YAM) | A/H1N1pdm09 | YAM | |
| 2013-2014 | A/California/7/2009 | A/Texas/50/2012 | B/Massachusetts/2/2012(YAM) | A/H1N1pdm09 | A/H3N2 | |
| 2014-2015 | A/California/7/2009 | A/Texas/50/2012 | B/Massachusetts/2/2012(YAM) | A/H1N1pdm09 | A/H3N2 | |
| 2015-2016 | A/California/7/2009 | A/Switzerland/9715293/2013 | B/Phuket/3073/20132(YAM) | VIC | ||
| 2016-2017 | A/California/7/2009 | A/Hong Kong/4801/2014 | B/Brisbane/60/2008(VIC) | A/H3N2 | YAM | |
| 2017-2018 | A/Michigan/45/2015 | A/Hong Kong/4801/2014 | B/Brisbane/60/2008(VIC) | A/H1N1pdm09 | YAM | |