Because the disease has been eradicated and no longer exists in the general population. No need to vaccinate anyone anymore.
Well... no.
It does still pop up every now and then.
No need to vaccinate anyone anymore.
But shouldn't we do it just to be absolutely safe?
And Swine flu, Japanese encephalitis, plague vaccine, o so many tins to vaccinate against.
You had better get them all.
At once.