“Mostly people with pre existing conditions”, that’s similar to regular flu. Strange thing about the Spanish Flu, it took a high percentage of healthy 20-40 year olds.
The theory of the Spanish Flu is that many died from a Cytokine Storm. Same thing killed my healthy young student in the family who was told she had a minor case of the flu.
Yep. Put their immune systems into hyper-drive, killing off healthy cells.