To be sure, sources have told me that the acu was trying to get him to speak.
As its website explains, “acu defines conservatism” (emphasis in original).
It appears to have been district health officers for the acu who first identified the polio symptoms in several children.
That acute means sharp is plainer to a child who knows that acu is the Latin for needle.
You have touched it sharply; acu means sharpness as well as the point of a needle.
The Plumarii mentioned by Pliny were craftsmen in the art of acu pingere, or painting with the needle.
Cicero's joke on a senator who was the son of a tailor: "Thou hast touched the thing sharply" (or with a needle, acu).