Influenza virus is an infectious agent belonging to the virus family Orthomyxoviridae that causes a respiratory tract infection (influenza or 'flu') in vertebrates. There are three main species ...

Influenza A virus belongs to the Orthomyxoviridae family, and produces virions of around 80–120 nm in diameter that contain an RNA genome of approximately 13.5 kb in size.

Doug Corwin knew there was a problem at his family's commercial duck farm in Long Island when he spotted scores of dead or lethargic birds during ...