Happy Go Nutty

A brown paper bag is feeling really unwell so he goes off to see the Bag Doctor.
After some extensive tests the Doctor tells him he has the deadly Bagbonic Plague.
The brown paper bag is stunned and says he is only a paper bag, and that he has never even seen anyone with this disease and he can’t understand how he could possibly catch this terrible illness.
The Doctor tells him that you don’t actually have to be in contact with someone infected in order to catch Bagbonic Plague.
He tells him that his father could easily have been a Carrier….