Hong Kong flu

noun
\ ˈhäŋ-ˈkäŋ- \
variants: also Hong Kong influenza

Medical Definition of Hong Kong flu 

: influenza that is caused by a subtype (H3N2) of the orthomyxovirus (species Influenza A virus of the genus Influenzavirus A) and that was responsible for about 34,000 deaths in the United States in the influenza pandemic of 1968–1969 — compare asian flu, spanish flu

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