is there evidence that schools have meaningfully contributed to Covid spread?
"The total number of COVID-19 outbreaks statewide rose this week by 9% over last week to 645. The biggest proportion of outbreaks are tied to the K-12 school setting, Lyon-Callo said.
Children ages 10-19 now have the highest COVID-19 case rate in Michigan, a rate that "is increasing faster than that of other age groups" she said. School-related outbreaks, she explained, aren't all tied to the classroom setting. Many are linked to sports and other gatherings among students."
[1]: Frustratingly, everyone uses different age buckets for reporting. So the state uses ranges like 0-17, 18-50, 50-65 etc. But looking at the individual counties that have a bit more granularity, under 19s appear to be one of the top demographics despite having some of the fewest tests. However I haven't bothered to normalize for population or anything like that