For some reason I can't cut and paste the link. But there was a report that came out about a week or so ago. Wait. I figured it out.
This are the type of studies that do studies of other studies.
Ie, look at everyone else's work, not necessarily control for the right variables and see if you can't get any more information out of it that the original researchers didn't or didn't intend to answer.
But even so, the clickondetroit conclusion doesn't exactly match what the study in nature suggests
"The findings suggest that school closures - introduced in many countries as part of lockdowns aimed at controlling the coronavirus pandemic - are likely to have a limited impact on transmission of the disease, the researchers said."
or, even if you don't close schools, the old folks are still likely to get it, is what they're suggesting.