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Table 3 Antigenic analysis of the A(H1N1) isolates in Yamagata by the HI test

From: A two-year survey of the oseltamivir-resistant influenza A(H1N1) virus in Yamagata, Japan and the clinical effectiveness of oseltamivir and zanamivir

  HI titer of post-infection ferret sera to:
Viruses A/Solomon Islands/3/2006 A/Brisbane/59/2007
A(H1N1) vaccine strains   
   A/Solomon Islands/3/2006 160 160
   A/Brisbane/59/2007 160 160
2007-2008 isolates   
   A/Yamagata/1/2008 80 160
   A/Yamagata/66/2008 160 160
   A/Yamagata/67/2008 160 320
   A/Yamagata/68/2008 160 160
   A/Yamagata/69/2008 160 160
2008-2009 isolates   
   A/Yamagata/125/2008 20 10
   A/Yamagata/126/2008 40 40
   A/Yamagata/128/2008 40 40
   A/Yamagata/45/2009 20 160
   A/Yamagata/80/2009 20 40