One thing that I suspect with the teachers, is that because it is a free day off if you claim a vaccine reaction, many view it as a perk they don’t want to pass up.
They like to play hooky too.
Haha - I was kinda generously including that in "psychosomatic".
Regardless, at least some of the parents learning that quite a few of the teachers were out would undoubtedly be influenced by that...