When my son was little he had a reaction to a medication and wound up looking exactly like this. It was hives.
Psssh, throw some horse paste at that kid and he’ll be fine. (Please note this is sarcasm and it’s horrible this kid is having to go through this due to his horribly neglectful parents).
Prove that measles is a virus that requires a vaccine. Also: horse paste, vaccines … quack treatments.