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Descendants of the H1N1 influenza A virus that caused the catastrophic and historic pandemic of 1918–1919 continue to contribute their genes to new viruses, causing new pandemics, epidemics, and epizootics. Drs. David Morens, Jeffery Taubenberger, and Anthony Fauci discuss the influenza A events of the past 91 years.
Morens et al. (Tue,) studied this question.