Opera Chic tends to accept the conclusions of the classic study by Peter J. Davies on Mozart's ilnesses and death (.pdf here; the truly excellent book is here); still, it's probably inevitable that scholars and doctors will forever argue about what really happened on that December night to poor Amadé: the diagnostic possibilities are just too many.
The latest example is "The Death of Wolfgang Amadeus Mozart: An Epidemiologic Perspective" where, apparently, enough evidence is presented that makes it possible to think that Mozart was killed by an infection -- a strep infection.
What matters most, to Opera Chic, is that right before dying Mozart asked that one piece of his be played, because he wanted to hear that music one last time before he took leave of this world. And it always touched OC's heart that he chose, of all his astonishing output, Der Vogelfänger bin ich ja: