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