(Misplaced) emphasis on "cases" of coronavirus?

Medical overview of what constitutes a #coronavirus "case" epidemiologically. Should we be concerned about the increase in number of cases? How does the severity of coronavirus rank against the more severe influenza's, e.g. 1917's Spanish flu?

Why has the case fatality rate gone down by an order of magnitude in only six months? A little basic common sense applied to what has become, surprisingly, less well understood over time: coronavirus.

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