Would you make it a crime if I refused to pay the fine or abide by the quarantine?
Yes, if the person decides to take it that far. Same as parking tickets or driving without a license.
Look, either "mandatory" means something, or it doesn't. Are you, or are you not, in favor of the government somehow forcing people to vaccinate and somehow forcing people to accept consequences if they refuse?
I am. There are many ways to put others at risk. There are complicated risk/reward situations. There are situations where the risk, even to others, is worth the reward or just to avoid the drawback. Speech is like that. It's dangerous as all hell, but also equally rewarding.
Refusing to vaccinate (with obvious qualifiers) is not like that.
To head off the inevitable reductio ad absurdum, that's not for every risk to others as I have already stated, nor is it for every vaccine, nor every conceivable health procedure that has some sort of public benefit. I'm not talking about enforced calorie limits, nor children being force fed kale at gunpoint. There are some vaccines for some disease where we have
overwhelming and comprehensive evidence of their safety, efficacy, and the
deaths and maiming that results from low or non-existent vaccinated populations. We also know of the risks that people who for medical reasons can't get the vaccine are put under if not everyone who can does, and we also know that the vaccines don't work 100% anyway, making a herd immunity that much more important. In these cases, I'm for mandated childhood vaccinations.
I look forward to the onslaught of scenarios trying to poke holes in my points.