dartsndeacs
THE quintessential dwarf
Best data we have right now is the icnarc for the UK. Roughly 50% mortality if you are on a vent at any time from Covid, closer to 65% if need a vent in the first 24 hours of critical care. Check figure 12 in the pdf of that link.
https://www.icnarc.org/Our-Audit/Audits/Cmp/Reports
So looks like 25% death rate if you are young and get into critical care (50-75% for older folks). Also, don't know if I'm reading it correctly, these numbers don't seem as if prior health issues/obesity are as significant of a factor as previously assumed. I.E., it seems more deadly to the younger crowd than I would have thought.