Asian flu
noun
                                
              
          
                                                      : influenza that is caused by a subtype (H2N2) of the orthomyxovirus causing influenza A and that was responsible for about 70,000 deaths in the U.S. in the influenza pandemic of 1957–58                                      
                
called also Asian influenza
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  Merriam-Webster unabridged




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