Generally there are exemptions for valid reasons like: compromised immune system, other conditions, etc. And as with everything else there will be exemptions and fine if one refuses to serve someone with exemptions.well some don't get it for religious reasons or medical reasons like a compromised immune system. And there is a chance of side effects...though they're are generally minimum but some have gotten severe reactions to the vaccinations. It's also freedom of choice in a democratic society.
"Some have severe reactions", that falls under same category as other vaccines: 100 people that die, have debilitating side effects per 10,000 people that are not dead and with debilitating side effects as a result of people wondering around with contagious disease. Not a valid reason to refuse vaccine.
Religious and freedom of choice reasons: Those clash with other important elements in democratic society. Individual's right to not be harmed by others, etc. Religious and freedom of choice reasons were always dependent on not going against basic human rights of others.
As such you cannot: burn infidels on stake, poison or give deadly disease to unbelievers, cast devil out of your workmate by giving them 10 lashes because they object to your religious belief that devil worshipers eat cheese. One goes to jail for that, religious belief or not.
One is also not allowed freedom of choice to: have sex with others when they know they have AIDS or STD without informing them, carry a bomb on them because they feel like it; or spray lawn with radioactive material because they believe cosmic radiation opens one's soul to knowledge of universe, etc.
Well, because it impedes on other peoples basic and individual rights.
Thus, it's not as simple as: if I want to take my chance with deadly contagious disease and freely walk into stadium, school, shop full of people, it's my right because of freedom of choice.
Nobody will care if we get vaccine good enough so only unvaccinated will die, until then one's freedom choices have deadly consequences on others basic rights.
There is only one winner in that argument. Like with freedom of choice to walk around with a bomb in the pocket.