I am curious if this is true, ie: does medical science hold above as an accepted fact by general consensus?
I ask because my understanding is that the 1918 flu (aka Spanish flu) which was an H1N1 (upper respiratory infection in humans , intestinal tract in birds) predominantly killed young adults, ie: healthy non-immunocompromised people. Here's the wikipedia remark:
https://en.wikipedia.org/wiki/1918_flu_pandemic
"the 1918 pandemic predominantly killed previously healthy young adults."
"a rapid progressive respiratory failure and death through a cytokine storm (overreaction of the body's immune system). It was then postulated that the strong immune reactions of young adults ravaged the body, whereas the weaker immune systems of children and middle-aged adults resulted in fewer deaths among those groups"
But there's some conflicting explanations: "special circumstances (malnourishment, overcrowded medical camps and hospitals, poor hygiene) promoted bacterial superinfection that killed most of the victims typically after a somewhat prolonged death bed "