Even The Little Ones Are Affected

Of course, nothing could be more normal. Life is completely different from what Master Pedro taught us it was before the Plague hit, seeping into every aspect of what had once been considered civilized life, including children's fairy tales.

Apparently, Peter Pan wasn't supposed to have ever contracted the disease,
but how else would he have been able to accomplish all those feats?

Unfortunately, Master Pedro cannot corroborate or contradict my statements any longer, as he had to be burned at the stake after contracting the virus himself.

Source:
Once Upon A Zombie