Asian influenza 1956

The influenza pandemic the "Asian flu" was one of the famous influenza pandemics in history. The "Asian Flu" was a category 2 flu pandemic outbreak of avian influenza that originated in China in early lasting until It originated from mutation in wild ducks combining with a pre-existing human strain. A vaccine for H2N2 was introduced in , and the pandemic slowed down. There was a second wave in , and H2N2 went on to become part of the regular wave of seasonal flu. In , the H2N2 Asian flu disappeared from the human population and is believed to have gone extinct in the wild.
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Hilleman in 1958

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Asian Influenza Pandemic | History of Vaccines

We can only hope that people will have taken advantage of their opportunities and at the end it may be possible to construct an adequate explanation of what happened. He was referring to that year's Asian flu pandemic. In the event, neither the Unit nor the PHLS undertook any large scale research projects during the outbreak and later studies were limited. The Unit's retrospective investigation had a response from 42 practices, of which only 29 provided useable data.
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History lessons: the Asian Flu pandemic

Asian flu of , also called Asian flu pandemic of , outbreak of influenza that was first identified in February in East Asia and that subsequently spread to countries worldwide. The Asian flu was the second major influenza pandemic to occur in the 20th century; it followed the influenza pandemic of —19 also known as Spanish flu and preceded the Hong Kong flu pandemic of The Asian flu outbreak caused an estimated one million to two million deaths worldwide and is generally considered to have been the least severe of the three influenza pandemics of the 20th century.
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H2N2 is a subtype of the influenza A virus. H2N2 has mutated into various strains including the Asian flu strain now extinct in the wild , H3N2 , and various strains found in birds. It is also suspected of causing a human pandemic in Some researchers have asserted that the — flu pandemic also known as Russian flu was caused by the influenzavirus A virus subtype H2N2. More recent research has suggested H3N8 as a more likely cause.
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