Refusing to take a vaccine doesn't kill people. Neither does taking the vaccine in question do anything to actually keep other people from catching what the vaccine is for. So this is a pointless comparison.

Even if this comparison wasn't pointless the idea is incongruent with your previous statements that people have the freedom to do whatever they want unless "it hurts someone else" which is the argument used in favor of vaccine mandates. And therefore doesn't work to support your position and does quite the opposite.

Finally I'll still maintain a pretty big difference between forcing someone to do something vs forcing someone not to do something. There is nothing morally wrong with banning people from drinking poison. There is something morally wrong with forcing someone to drink poison. Suicidal ideation is reason enough to doubt the capability of someone to make their own decisions. There may be edge cases where they are sane. These are entirely circumstantial.