Jodie: "If you can't look after your children when they're sick then it's just not right, work or no work and whatever circumstances you're in as they are your children and your first responsibility is to them.". Wiggle, I believe you also said the equivalent.
Hang on there. I don't think anyone says they will send their children in if they KNEW the child was poorly. Of course our first responsibility is our children. And that means keeping them at home to recover if they are poorly. Therefore, I believe my nose is clean according to your high standards.
What you are advocating is not just keeping children in when they are poorly. But to keep them in for up to 48 hours after the symptoms have stopped - because children could supposedly be contagious for that time. That has nothing to do with whether the child is feeling poorly. My child could be rudely well after an incident and he was for a full day whilst I sat at home with him getting bored at home. I felt completely justified in sending him in the next day. Under your scenario, I would have had to spend another 24 hours with him at home to be considered to have "put my child as a priority", which is patently OTT.
Like I said and few others have confirmed this, dd's school does not have any 24/48 hour blanket exclusion policy. So it is by no means a universally accepted fact that a child is contagious 48 hours after they are well. That must surely depend on the bug and the child. I don't buy the abundance of caution argument.
Human beings have an immunity system for a reason and that system needs a work out to be on top of viruses. That includes recurrent exposures to low grade infections. I may be imagining this, but it seems that those people with the greatest fear of diseases, dirt and infection seem to fall ill the most.