H1N1, Influenza A, Russian Flu, TEM

1970s 1977 1978 20th century a/ussr/90/77 strain abnormal avian flu virus avian flu avian influenza a h1n1 avian influenza a avian influenza virus avian influenza avian bird flu virus bird flu bird influenza virus bird influenza colorized disease em enhanced epidemic flu h1n1 histopathology infectious disease influenza a h1n1 influenza a virus influenza a infulenza medicine microbiology micrograph microorganism microscopic outbreak pathogen russia russian influenza russian science tem unhealthy viral disease virus