I think children have the highest chance to be asymptomatic, the thing is that they just plain refused to say if he was asymptomatic or not. They also refused to say when he took the test too. Can children get false positives? I only hear it from adults getting it.
But other than that, how is mentioning health details a personal thing? Its not the same thing as revealing the kid's full name, address, and so on. If its said he's overweight, his process would be rocky but he'll be fine since kids can survive nearly anything tossed at them. Healthy? Perfectly fine unless he got a bad roll of the dice. That's it. End of story, end of problem.
I don't really know how to feel on school openings itself. I'm not really informed on how good, bad, or normal to say anything on this one point.
Hell, I even pointed out these among a group of people when I got this article and got ganged. And yes, they think the kid is already automatically going to going to die just simply because he got the virus. No thinking and questions allowed, I guess.