Co-op Academy in Swinton has been worst affected after positive cases in Year 7 and Year 10 meant both year groups were sent home on Monday morning.While the school initially said siblings should also stay off, parents have now been told that brothers and sisters can attend.Only if the children who are self-isolating begin to suffer symptoms should other members of their household face the same restrictions.But even if parents don't need to isolate, it's a blow for those with little ones who