You should add "timeliness of diagnosis and treatment" to that list, too.
People who get tested as soon as they suspect infection, or who get tested routinely (Trump), have a more positive outcome than those who don't get diagnosed as quickly.
Trump was treated within a day or two of contracting it , 3 days at the outside, based on reports. His treatment might have been more aggressive than the average patient, but he was back at work after testing negative several times in about 10 days.
Awesome, just like taking birth control pills, immediately after an "accident".
Actually Flapp, your suggestion is tremendously insightful, as it may be true that many people may be delaying testing, for whatever reasons, and, hence, are not able to get the treatment they should be accessing they need quickly, since Covid-19 is far more contagious than the flu or common cold.