viruses are isolated over the world and also circulate among poultry in Asia. In 2010, two
H5N1 highly pathogenic avian influenza viruses (HPAIVs) were isolated from fecal samples
of water birds on the flyway of migration from Siberia, Russia to the south in Hokkaido,
Japan. H7N9 viruses are sporadically isolated from humans and circulate in poultry in
China. To monitor whether these viruses have spread in the wild bird population, we …