Really there is a lot of alarmist nonsense being promulgated on GN today. And, I am afraid Welbeck I include your post among it. What is the evidence that any older person getting the virus will almost certainly be left with long term damage?
Morbidity for Corvid-19 runs from under 1% for children to 10-15% for those over 70. and the most noticeable feature of those who have died is that they had an underlying medical condition. Some may have died anyway from that condition. Having the virus in you when you die doesn't mean that it killed you.
Public Health England has published and upgrades regularly a Guidance document for all the different groups of people. Follow that, it is quite clear, and stop trying, metaphorically, to see how many corvid-19 angels you can get to dance on the head of a pin.
Yes, of course I could get the virus and it could kill me but I am probably more likely to have a fatal stroke or heart attack.
I am over 70 and am following the appropriate guidance for people my age who have no underlying health conditions.