I think you need to go beyond the form if this is worrying you. Find out what it actually covers. List the things that you specifically don't want and ask the kinder if these things are treated or are part of the treatment if you sign the form.

What I would expect on signing the form would be in case of serious injury, I'm allowing them to treat DD1 in a way that makes her as stable/safe/comfortable as they can with the limited first aid resources they have. I'd expect a phone call and the ambulance called (if required). I would expect that once an ambulance is on scene (if it arrives before me which I would highly doubt), the kinder form would become void anyway as the paramedics have their own duty of care which would probably override kinder. I imagine the kinder staff would go along with the paramedic recommendations. I wouldn't think there would ever be a reason to treat for sickness at this level. Let's face it, kids don't get THAT sick during a five hour kinder session and if they were sick, they'd probably be at home anyway.