It is PNUEMONIA that kills the flu afflicted.
So take your pick
* Bacterial pneumonia
* Viral pneumonia
* Fungal pneumonia
* Parasitic pneumonia
* Atypical pneumonia
* Community-acquired pneumonia
* Healthcare-associated pneumonia
* Hospital-acquired pneumonia
* Ventilator-associated pneumonia
* Severe acute respiratory syndrome
Chances are one of the above pnuemonias killed the little tyke.