chicken pox..

I have 4 children, one had already had chicken pox years before. The other 3 are a lot younger and one developed chicken pox and was off school, and the other 2 didnt, I still sent the other one of school age to school. This is because chicken pox is not actually infectious until the first blisters appear, it is them that spread it about, so once they get the blisters you keep them off school until no more blisters appear and all the spots have scabbed over. But usually if one child in the class develops it the rest quickly follow whether you send them school or not.