You’re obviously getting good grades at UCLA, otherwise you wouldn’t be considering a transfer. If you enjoy UCLA and you’re doing well, don’t try to fix what isn’t broken. That’s how things get actually get broken in the first place. If you’re uncomfortable taking the vaccine, and the school you’re in gives you exemption, it’s probably a good idea to go with that. Not all schools are so vaccine friendly, and the last thing you want is to put in a position where you feel like you have to compromise your morals. That’s not a position you want to be in, because it’s always a losing battle.