The thing is, that is Italy and arguably in the US, there are more people under 50 with serious health problems; diabetes is wide spread as just one example. I believe Italy had a much higher smoking rate someone in their 80s there could have very weak lungs, again the US profile could be different.

Headline: "COVID-19: Millennials can and are falling seriously sick from coronavirus, says new data"

https://nationalpost.com/news/world/covid-19-millennials-can...