a form of epidemic influenza caused by a virus believed to have been carried from Asia in the late 1950s.
Also called Asian influenza.
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British Dictionary definitions for asian flu
a type of influenza recurring in worldwide epidemics, caused by a virus (A2 strain or subsequent antigenic variants), which apparently originated in China in 1957
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012