Also not quite. The 79-21 ratio is based on the severe cases, ie those cases that relies on hospitalization and does not include those who recovers from home ... and certainly do not include those un-infected which today is numbering at 7+ billion people.
iE right now we have 327,939 closed cases, which is -very- close to the total number of detected infections as of 14 days ago (Mar 22)-- 337,459.
of course, this doesn't mean that 21% of all infected people die. there is a bias towards the sick (edit: although this is improving as the number of tests increase) when it comes to tested cases, after all, and there is a not insignificant number of people who are asymptomatic.
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