Influenza ain't got crap on Harps.
actually, Gastroenteritis aint got crap on Harps.
Influenza would be characterized by body aches, fever, and a dry cough. It only rarely causes nausea and vomting and that is only in small children - usually they only vomit durring a coughing spell from the flu rather than an actual stomach issue.
The stomach "flu", or Gastroenteritis, which is often referred to as having the flu, is done so incorrectly. This is what Span and Harper had, which is similar, only substitute the nausea and vomiting for the coughing, the fever usually is not nearly as high. Most of the body aches and fatigue come from the vomiting spells.