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. 2019 Jan;25(1):161–165. doi: 10.3201/eid2501.171878

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This is a publication of the U.S. Government. This publication is in the public domain and is therefore without copyright. All text from this work may be reprinted freely. Use of these materials should be properly cited.

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Antigenic cartograph representative of hemagglutinin inhibition (HI) titers of canine influenza viruses, China, 2009–2017, showing antigenic groups A–C. Map was generated by using AntigenMap 3D (http://sysbio.cvm.msstate.edu/software/AntigenMap) and HI data shown in Table 2. One unit (cell) represents a 2-fold change in HI titer.