I had a flu death in my family that was a teenager. I am not convinced it was really the flu but that was the diagnosis. Death happened with a few days from pneumonia and sepsis. No known immune issues. Coma happened 4 days after first flu symptom. Death later that night.
that’s so sad Rummy. 4 days to coma? wow. That must have been hard for your whole family. It’s always hard when kids die. Sorry for your loss.