Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1297-9716-44-92/MediaObjects/13567_2013_Article_300_Fig1_HTML.jpg)
Morphology of the canine H3N2 influenza virus. H3N2 canine influenza virus (A/Korea/S1/Canine/2012) propagated in eggs was purified by sucrose gradient centrifugation. The purified virion was observed using a transmission electron microscope.