Ds2 has had it since last Wednesday though was ill for a few days before that. He's fine now but still has some spots that look pretty nasty.
His big brother now has spots which I suppose gets it over with quicker than if he'd waited the proper two weeks 
So I have both of them off today. I've emailed the school to ask what their rules are if any, but I'm a bit worried that ds2's spots won't be healed properly even by the end of this week, and that they might get funny with me for keeping him off for too long.
Not sure how healed is healed enough, iyswim? Anyway...going to be an interesting few days filled with brotherly love