It's still early and it's subtle, but if you're paying close attention, it's discernable. It seems like the onset of acute brain fog. Like the email my boss sent out this morning - filled with uncharacteristic jibberish sentences and misspelled common words from an otherwise pretty smart individual. I'm seeing lots of people having trouble using their debit cards at checkout counters as if they've never used one before. The lady who cleans our house is having trouble remembering which room she already vacuumed and we're finding dirty folded cleaning rags in the linen closet. Tell-tale signs of "something" happening to people. Can't quite put my finger on it but I think it's from the jabs.
What say you?
If barely literates spouting jibberish is subtle in your world, you need to move.