More to the point to me, is the fact that there is no proof that these vaccinations provide true immunity
Well, we do seem to have a lot fewer cases of measles these days.
We may be seeing less measles (although every year there are cases on college campuses that require quarantines) but we're seeing fully vaccinated 'kids' and adults come down with it when it does make it's way through.
In fact when I was pregnant a couple of years ago, I was told I did not have immunity to measles - this is after being immunized as a kid - and twice at college (two different ones on different coasts) because I didn't have the proof of immunization.
So we may see less measles (that in reality is not a deadly disease - even though some cases turn that way --just like sometimes the cold can turn into pnuemonia) but now we also see all sorts of other childhood diseases that need other vaccinations, and other drugs to to control. - It's a vicious ugly cycle -I just cannot see that there is a reason for an employer to get involved in trying to enforce.