The thing that ultimately most oftenkills people from covid is a condition called acute respiratory distress syndrome or ARDS.
I knew what it was because my dad survived ARDS two previous times. I don't know what the survival rate is now but in 2011 and 2016 is was 40% meaning my dad overcame a 16% chance of surviving it twice.
He is in danger of going into ARDS again today.
Thoughts, good spells and/or prayers to benevolent deities appreciated.