H7N9, Influenza A, Avian Flu Virus, TEM

( )ssrna virus 2010s 2013 21st century abnormal avian flu virus avian flu avian influenza a h7n9 avian influenza a avian influenza virus avian influenza bird flu virus bird flu bird influenza virus bird influenza colorized disease em enhanced flu h1n1 h7n9 histopathology human infectious disease influenza a virus influenza a medical micrograph microorganism microscopic negative sense orthomyxoviridae pathogen rna virus science segmented single stranded tem unhealthy viral disease virus