Frederick G. Hayden

OVERVIEW: What every clinician needs to know Pathogen name and classification Influenza viruses (types A, B, C) are segmented, negative-strand ribonucleic acid (RNA) viruses in the Orthomyxoviridae family. Influenza A viruses of various subtypes infect many animal species (e.g., birds, swine, horses, dogs, marine mammals, and felids) in addition to humans. Influenza A viruses are…