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Hong Kong flu

The Hong Kong flu, also known as the 1968 flu pandemic, was a flu pandemic that occurred in 1968 and 1969 and which killed between one and four million people globally.[1][2][3][4][5] It is among the deadliest pandemics in history, and was caused by an H3N2 strain of the influenza A virus. The virus was descended from H2N2 (which caused the Asian flu pandemic in 1957–1958) through antigenic shift, a genetic process in which genes from multiple subtypes are reassorted to form a new virus.[6][7][8]

Hong Kong flu

Influenza

H3N2 strain of Influenza A virus

1968–1969

between 1 and 4 million

0.2%

Clinical data[edit]

Flu symptoms typically lasted four to five days, but some cases persisted for up to two weeks.[30]

The and Encyclopaedia Britannica estimated the number of deaths due to Hong Kong flu to be between 1 and 4 million globally.[1][34]

World Health Organization

The United States (CDC) estimated that, in total, the virus caused the deaths of 1 million people worldwide.[109]

Centers for Disease Control and Prevention

– Database of influenza genomic sequences and related information.

Influenza Research Database