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. 2023 Feb 14;15(2):535. doi: 10.3390/v15020535

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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HI and neutralization antigenic maps of A(H1N1)pdm09 viruses. HI (A) and neutralization (B) titers of ferret antisera were used to construct antigenic maps. Virus names are black, whereas amino acid substitutions are grey. Viruses are abbreviated as follows: A/Singapore/GP1908/2015 (Singapore); A/Tokyo/UT-WD039-0/2019 (WD039-0); A/Tokyo/UT-BB251/2019 (BB251); A/Tokyo/UT-BB262/2019 (BB262); A/Tokyo/UT-GR156/2019 (GR156); A/Tokyo/UT-GR253/2020 (GR253); and A/Tokyo/UT-AC109/2020 (AC109). Data were analyzed by using a nonparametric Friedman test followed by Dunn’s multiple comparisons.