Vaccination for protection from the plague was under discussion.
Hazrat Nawab Muhammad Ali Khanra said, ‘How many people can the vaccination reach?’
Upon this, the Promised Messiah (as) smiled and said:
This is the very parable whose depiction is recorded in Mathnawi that the mother of a man was an adulteress. He murdered her. The people asked, ‘Why did you kill your mother? You should have killed her lovers.’
He replied, ‘How many could I have killed, one, two, or how many more? It was befitting just to kill her.’
This is the very situation with the vaccine.
(Malfuzat, Vol. 4, p. 80)