Spanish flu research

Influenza A virus subtype H1N1
An electron micrograph of the virus that caused the 1918 flu.
Virus classification
(unranked):	Virus
Realm:	Riboviria
Kingdom:	Orthornavirae
Phylum:	Negarnaviricota
Class:	Insthoviricetes
Order:	Articulavirales
Family:	Orthomyxoviridae
Genus:	Alphainfluenzavirus
Species:	Influenza A virus
Serotype:	Influenza A virus subtype H1N1
Sampled strains
A/Brevig Mission/1/1918(H1N1) A/New_York/1/18(H1N1) A/AFIP/1/1918(H1N1) A/Iowa/1/1918(H1N1) A/London/1/1918(H1N1) A/London/1/1919(H1N1) ... Look for "/1918" on the full list of H1N1 strains

Spanish flu research concerns studies regarding the causes and characteristics of the Spanish flu, a variety of influenza that in 1918 was responsible for the worst influenza pandemic in modern history. Many theories about the origins and progress of the Spanish flu persisted in the literature, but it was not until 2005, when various samples of lung tissue were recovered from American World War I soldiers and from an Inupiat woman buried in permafrost in a mass grave in Brevig Mission, Alaska, that significant genetic research was made possible.