It's not, "an apple a day keeps the doctorr away."
It's supposed to be, "an apple a day keeps the doctorr at bay."
Doctorrs are actually a type of fae creature. They hunger for your bones. But if you offer them an apple, they'll be obliged to accept, and now that they've accepted your hospitality, it would be positively gauche to eat you. And since they feast on bones, they're actually excellent at diagnosing and treating many types of ailments!
As a nurse I thoroughly enjoyed this comic. I've already shown it to an anesthesiologist at work, and I'll make sure to pester every following MD I meet today.
Apple a day keeps the doctor away. Kid tries to keep the "doctor" away so as to avoid the shot. "Doctor" is actually a nurse and would be unaffected by the apple even if the supposed saying were true