I shit you not.. right around the time everyone where I work was getting the shot, I started getting the "brain fog" the vaxxed people were reporting. Never got the shot, but I swear I think the vaxxed people's shedding affected my performance. All I know is there is this period of time, during the vax rush, where I could tell I was having some mental trouble writing code or doing labview, putting abstract pieces together in my head seemed to be very difficult. I did a lot of menial tasks during that time, like building up enclosures, making cables, and other misc hardware, for the production and test equipment I've been designing. Needed to get done, was putting it off because it's not the "fun stuff" I like to do. It seems to have subsided, maybe I'm back to normal. A week's vacation definitely helped.. It could have just been "needing a break" all along, although the timing of the brain-fog and vax rush just seemed a little too coincidental to be benign.