I'm afraid the "rent a mob" outside the hospital are an absolute disgrace and their behaviour is despicable. They don't care about this poor child, they just want to be as disruptive as possible. Who do they think they are? They do not care about any of the children in that hospital, and how distressing and frightening they are making it for all who are at the hospital (staff, sick children, distraught Parents).
Yes, the whole thing surrounding this poor little soul is tragic, but the medical staff know a heck of a lot more about it than any of that rent a mob or the rest of us, come to that.
It's terribly distressing for the Parents, and of course, they want to do everything they can, but the sad reality is, for this little boy, there is no miracle cure. He won't have a quality of life, he would just be existing, with the aid of machinery. To my mind, doing that (letting him just exist without any hope of life quality), would be just cruel.
There's no happy ending for this situation, whatever final decision is reached, unfortunately. I wish there was. I wish a magic wand could be waved to make his brain whole again, and fully restored, with all senses intact, but there isn't one. A very sad situation.