https://www.mdpi.com/1999-4915/13/6/989
https://www.medrxiv.org/content/10.1101/2021.07.21.21260223v...
https://journals.lww.com/americantherapeutics/fulltext/2021/...
So we just don't know, and it's too early to place any bets one way or the other. That's how science works.