Unsick

Sick or unsick?

This blog does not often deal with questions of English usage, but I want to share these works by an innovative stylist who left the following on my desk: two literary masterpieces carefully penned with the first day of the autumn term in mind.
Note One reads: 'Olly is really sick cant come to school after tthe weekend.
Note Two reads: Olly come to school tommorow (sic) if He is unsick.
I particularly like the coinage 'unsick', and will adopt it myself from now on, when appropriate.
Olly is five, and his elder brother Zac who may have been acting under instruction, is 8.