Not true. The unconverted are quite apt at spreading heresy. Parents are likewise able to instruct their children in blasphemous teachings. All of these things are to the detriment of their immortal souls - something much more important than life.
Spreading heresy is not the same as spreading illness. People possess the freedom of whether or not they want to accept heresy or not whereas in most cases people cannot choose whether they contract illnesses or not. Likewise, it is not the purpose nor the concern of the earthly government to interfere with the conditions of our 'immortal souls'--something in which we do not even know if it exists. That's the job of God and the Church.
And sorry, but I don't buy utilitarian BS about the collective good and its superiority to individual rights. Such is the talk of tyrants and despots. Life has risks.
Well I don't buy into the Ayn Rand BS about individual rights and spoiled individuals being able to negatively affect the entire population just because of their 'individual rights' crap. Such talk is the talk of Satan and is the philosophy of right-wing despots and tyrants. Satan was the ultimate objectivist.
Question though, why do you fear unvaccinated children spreading sickness to the vaccinated ones? Wouldn't that make the vaccination moot?
It is about taking precautions. Sure the vaccinations are supposed to prevent the illnesses from being contracted, and in most case they do prevent that from happening, but you can never be fully certain, and so it is better to make it mandatory for everyone
who is going to be a part of the society to become vaccinated, so that we can further decrease the chances of other children contracting an illness.
Likewise, parents do not have the rights to refuse their children vaccinations either in my mind. I don't give a hell about your 'but it's my religious freedom hur hurr' bullcrap that religious nut parents say when they try to force their religion upon their child or mistreat their child because of differing religions.