I thought 6-8 weeks ago we didn't know that children aren't major vectors (let alone that it was pretty obvious), and I'm not even sure we know that now. Can

I thought 6-8 weeks ago we didn't know that children aren't major vectors (let alone that it was pretty obvious), and I'm not even sure we know that now. Can you provide some of this 'evidence that has gotten stronger' for this claim please? Suggesting that closing schools is pointless because they 'might' be more of a vector because their parents lack the competence to instruct or control their children seems unnecessarily pessimistic. Were I in a position of authoring public policy around this kind of event, I'd a) vigorously adopt the precautionary principle, and b) assume we could convince the parents and the parents could then convince their own children. I'm confused by the last claim you make -- I thought the 'for profit' camp was very much against closing schools (or indeed closing anything for very long).