Not being flippant, but confusion or strange behaviour must come with covid at whatever age. I've tested positive since Friday and have had a fuzzy weekend forgetting what I'm doing and saying daft stuff, and I'm not yet 65.
I guess as FarNorth says, with less testing going on we need to still consider covid as the culprit when older people get confused, if nothing else to rule it out.
Baby Reindeer - anyone watched it?
Alphabetical girls and boys names January 2024