[learc83]

It depends on where you are. If you have a low enough case count and a well functioning health department that is doing contact tracing, then it's helpful to confirm that your kid is positive.

If you're in an area where neither of those things apply then, for a child a test isn't going to change anything. It's not going to change their treatment. If it's positive they'll tell you to isolate, but if it's negative, there's a high enough false negative rate, and there are enough cases that it's still very likely they have it, so you'll still want to treat it like they do.