Table 1.

Influenza pandemics of the 20th and 21st century

Name of Pandemic	Year	Interval years	Deaths	Subtype involved
Spanish flu	1918	18	40–80 million	H1N1
Asian flu	1957	39	I–1.5 million	H2N2
Hong Kong flu	1968	11	I–1.5 million	H3N2
Influenza A(H1N1)	2009	11	238*	H1N1

^*As of 26 June 2009