I think I would be nervous taking him since he's turning blue without knowing what the problem is....god forbid what if the child died in daycare? Fifths disease is a scaley rash on the torso and a red cheek ( like they've been slapped) along with a fever and possibly a sore throat. Shaking and turning blue doesn't sound like a walk in the park and I really have to question why the parent wants to send the kid to daycare?