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nouna group of viruses including those causing influenzatype of:
Definition that contains orthomyxovirus
- swine influenza an acute and highly contagious respiratory disease of swine caused by the orthomyxovirus thought to be the same virus that caused the 1918 influenza pandemic
- swine flu an acute and highly contagious respiratory disease of swine caused by the orthomyxovirus thought to be the same virus that caused the 1918 influenza pandemic