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. 2019 Feb 7;24(6):1800467. doi: 10.2807/1560-7917.ES.2019.24.6.1800467

Table 1. Antigenic analysis by neutralisation assay using infected ferret sera, Yokohama, 2016/17 and 2017/18 influenza seasons.

Strain Clade Neutralisation titres of ferret sera against
Hong Kong/7127 Singapore/19 Osaka/163 Shimane/112 Yokohama/138
A/Hong Kong/7127/2014 3C.2A 320a 80 160 80 80
A/Singapore/INFIMH-16–0019/2016 3C.2A1 320 160a 160 160 160
A/Gunma/140/2017 3C.2A1a 160 320 80 160 80
A/Kagoshima/74146/2017 3C.2A1a 160 160 80 80 80
A/Osaka/163/2017 3C.2A1b 80 40 320a 40 40
A/Yokohama/181/2017 3C.2A1b 80 160 80 80 80
A/Yokohama/1/2018 3C.2A1b 160 160 80 80 80
A/Yokohama/145/2017 3C.2A1b 80 160 80 80 80
A/Shimane/112/2017 3C.2A2 320 160 160 1,280a 160
A/Yokohama/199/2017 3C.2A2 640 320 160 2,560 320
A/Yokohama/14/2018 3C.2A2 640 160 160 2,560 160
A/Yokohama/150/2017 3C.2A3 160 320 160 160 80
A/Yokohama/148/2017 3C.2A3 320 160 160 320 80
A/Yokohama/138/2017 3C.2A4 320 320 160 80 640a
A/Aichi/343/2017 3C.2A4 320 80 80 40 640
A/Okinawa/64/2017 3C.2A4 320 160 80 40 640

aHomologous combinations are shown in bold.