Yes, but if that stranger has recently talked about really wanting to kill your best friend and you see them casually walk past in the direction of their house with multiple weapons and despite seeing a cop standing conveniently nearby you don’t do a thing about it cause it’s not your business, yeah it’s kind of your fault
These illnesses are known to kill. If you are fully aware of this, choose not to prevent any disaster with those convenient vaccines, and still let your child go hang out with poor little billy, you should take all the guilt if billy ends up dead at age 7 from preventable disease.
The difference is that illness isn't definite.
But the vaccine can kill as well.(Refuted, or at least mostly so.) Because it gives you the disease. People walk around, thinking the vaccine will protect them and then go back to work 15 minutes later and shed the virus everywhere. To be fair, this is a problem with people not the vaccine, but it's possible that the people who act in this manner (most), are actually more of a risk than unvaccinated people.
But that isn't what your thing was about.
Obviously if you have the disease you should stay home. But yes, I suppose the death is sort of your fault. But see my earlier metaphor.