Xia, Jing Genetic and antigenic evolution of H9N2 subtype avian influenza virus in domestic chickens in southwestern China, 2013-2016. [electronic resource] - PloS one 2017 - e0171564 p. digital Publication Type: Journal Article ISSN: 1932-6203 Standard No.: 10.1371/journal.pone.0171564 doi Subjects--Topical Terms: AnimalsAntigens, Viral--geneticsChickensChinaCross ReactionsEvolution, MolecularHemagglutinin Glycoproteins, Influenza Virus--geneticsInfluenza A Virus, H9N2 Subtype--classificationInfluenza Vaccines--immunologyInfluenza in Birds--immunologyNeuraminidase--geneticsPhylogenyPoultry Diseases--immunologyVaccine PotencyViral Proteins--genetics