From what I've read it's very rare. Does anyone have any experience?
DS2 had it in January. He's had a cold for a few days now. Spots started on his bum yesterday afternoon and in the evening he had a few on his legs and feet and a couple of his hands. They're pretty much the same today and none in or near his mouth. He's absolutely fine in himself.
This couldn't come at a worse time as he's due an operation in less than 2 weeks and I'm really worried that they won't want to operate.