A 32-year-old member asked:
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is the flu always a disease caused by a virus?

1 doctor answer
Dr. Larry Lutwick
48 years experience Infectious Disease
Sure: True influenza is always caused by an influenza virus but there are lots of influenza-like viruses caused by other respiratory viruses and the stomach 'flu, not an influenza at all.
Answered on Feb 26, 2017
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