Some math: (updated)
Middle range 40%.
40% of USA adult (over 18) populations is 83,000,000
That's how many in the USA adults are likely to get coronavirus.
20% of 83,000,000 is 16,000,000
The experts right now best guess scenario is 16,000,000 Americans adults wont "ultimately be fine" from Coronavirus.
1% of 83,000,000 is 830,000.
Best guess numbers right now say 830,000 American Adults will die from the coronavirus.