People who advocate “mandatory vaccinations” make many assumptions.
They assume that some form of utilitarian ethic is correct.
They assume that cost-benefit calculations over the entire country or the world are at all possible.
They assume that actual calculations of total costs and benefits or pleasures and pains, if the vaccines work, favor forced vaccinations.
They assume that there are no long-term bad effects of the vaccines.
They assume that the actual vaccines presently available (which are unsafe and don’t work) will, when coerced onto people, in fact promote the greatest good for the greatest number.
And so on.