Hey Lemmy, do you think COVID is/has caused a brain drain and if so from what countries to where?

My mother is a teacher at a private middle/high school. She has noticed, and her colleagues agree, that the new class of freshmen this year were noticeably less well behaved compared to previous years. She said they are also way less able to pick up on social cues. Keep in mind this is an expensive private school with kids that had every advantage and ability to mitigate the effects of remote schooling.