I found out today that a little boy my dd played with yesterday has come out in chicken pox this morning. We thought she might have had it before but the doctors couldn't confirm it so there is a chance she's not immune. Do I keep her away from playgroups etc from now or do I wait a while? I don't want to make other children infectious, she has a number of other medical conditions so her immune system is a bit rubbish anyway. I know you can't help catching it but I can help spreading it. Does anyone know the infectious period or if she would be infectious straight away? Even if the spots havent appeared. ? Thanks