Sqad, the lesson in this is that you can catch chickenpox twice - you'll know that....and, for adults, it can be quite serious.
The global business improvement team of which I had been a member twice in my time, well one of the team leaders came back from Central America to London. His six year old was invited to a chickenpox party - 'well if one has it, let's get it all over.'
He flies on after the weekend - doesn't feel well in Beijing.....ends up in Shanghai feeling like sh-yte and the doc called in, 'you have chickenpox.'
His hotel, a major luxury brand were fantastic, agreeing to keep him there, rather than a Chinese hospital, identifying staff who had had the disease and who could 'serve' the room. He was there for three weeks and, afterwards, he said that he didn't really know where he was for the first ten days.... Anyway, my intervention came with the Air Ambulance to get him back to London.
At that time, it was one plane to Hong Kong and then a second one to London. However, HK refused to take him......it was only resolved by my Chairman and myself going to see Chris Patten, then Governor. He just rolled his eyes and that was it, bingo, an order to his aide..... Poor guy ended up with a mild case of shingles, not surprising.....
Hence my reservation in having this kid travel with the pox.....though we don't know his age, to be fair.