From my looking around, I don’t see that evidence. I see things like:
- A CDC report that shows no association between a positive COVID tests and attending in-person school or child care. This is in contrast to social gatherings or at-home visitors, which were associated with positive COVID tests.
- A large-scale study of COVID transmission in child-care programs (in the journal Pediatrics ). . This study “found no evidence of child care being a significant contributor to COVID-19 transmission to adults. This finding is consistent with previous studies showing a lack of association between school closures and transmission rates.” [It doesn’t look at transmission from adults to children or children to children, and cautions that the level of background transmission may be a threat to child care.]