Because of his chest infection. To be fair though they are very kind and lovely at the paediatric assessment unit. And at least they didn't take any blood today! Just a chest x-ray, yet another one.
It looks like they don't really know what's going on, but they are reassured by the fact that ds is still in good spirits and gaining weight well.
They are trying him now with steroids (orally) for three days and another course of AB's. We'll see how it goes...