China is already done with the hard part. Lock down, get the virus under control, make a lot of test kits, and before long you can rely on mass screening, contract tracing, and targeted isolation, and get people back to work.
If 20% of the population are simultaneously suffering from "a bad flu", what do you think happens to supply chains?
Your information is out of date.
Younger adults are large percentage of coronavirus hospitalizations in United States, according to new CDC data
White House officials warn millennials they are not immune
https://www.washingtonpost.com/health/2020/03/19/younger-adu...
> In South Korea, for example, which had an early surge of cases, the death rate in Covid-19 patients ages 80 and over was 10.4%, compared to 5.35% in 70-somethings, 1.51% in patients 60 to 69, 0.37% in 50-somethings. Even lower rates were seen in younger people, dropping to zero in those 29 and younger.
"Immune" is not an accurate word but... "almost unaffected" is accurate. These are the most recent numbers. Warning millennials about risks is almost entirely to protect the old, not to protect themselves.
[source] https://www.statnews.com/2020/03/18/coronavirus-new-age-anal...
The % of people hospitalized within an age rage tells us nothing without the % of that age range infected.
To me, this statistic just means the young & old don't commingle much compared to Italy/China.