This is the problem with a government one size fits all system. There isn't necessarily one right answer. And in a system like ours where what government does is influenced most by big pharmaceutical agriculture corporations who have a business interest in sick people and sick animals, well you're likely not to get the right answer at all.

That sounds like the tragedy of the commons.

And the more a vaccinated person is exposed to a disease, the more permutations of that disease get thrown at the vaccinated population. If one takes, then we have the whole problem of the disease all over again. One consequence of the short life of bacteria and the mutation of viruses is that they're basically brute-forcing our immunities of every population they're in contact with.

This is why it's _so important_ that people follow vaccination programs. Eventually we'll have to deal with new diseases, but if we aggressively and correctly vaccinate, we can stave off that day for a lot longer than if we half-ass it.

IMO, vaccination is no replacement for promoting a strong natural immunity and preventative medicine. Both of which are virtually thrown out the window in modern medicine.

Anything less means "controlled study needed."