A few months back experts said opening schools would be a super spreader event.

For the most part, like all super spreader predictions, this forecast was also wrong:

New research suggests that in most regions, with the exception of the South, opening schools for in-person learning was not associated with an increase in COVID-19 case rates in the community

Source: Study finds that in much of the US, virtual school did not lower COVID-19 case rates in surrounding communities

There are reasons epidemiology seems less accurate than astrology but with the honesty of alchemy.