My wife was diagnosed stage-4 cancer almost 4 years ago, has had 60+ chemo & keytruda treatments, 2 dozen radiation treatments, a few surgeries, handled the 3 jabs fine and has avoided getting sick with covid. She is Medicare age.
Then there is my 98 y/o mother who has myasthenia gravis, eats whatever the hellll she wants to. Refuses the clot shots. Has been around oodles of people who have come down with Covid and is still kicking.
The rest of us have trouble keeping up with her.