I never really needed one, I rarely get sick. I'm lucky enough to have an immune system that can fend off viruses.
hahahaha you're such a dumb motherforgeter. do you actually think you can condition an immune system to completely defend against diseases like this?
and for that matter, it's intensely selfish as well, as if you can be vaccinated and don't, you become a potential carrier for those who can't be vaccinated due to weak immune systems to begin with.