I am so sure I am going to be toting my childhood vaccination records around. Of course, I don't live there, but still. No one carries things like that in their pockets.

Also, I didn't think vaccinations worked after you had been exposed and (most hysteria-based version) probably had IT.

Finally, these same people who want THIS also want freeform immigration which implies whomever in whatever quantities moving freely wherever they want. Well, there's consequences to that.

It looks like maybe New York just has to ride out some cases of the measles?