Teachers unions disagree. They want to sit at home and collect a check.
K-12 Schools need to rebate school taxes if schools are closed.
While the risk to children may be minimal, it certainly is not to 40 and 50 year old teachers, the people who are mounting the greatest opposition to reopening of classrooms.
The child might be asymptomatic, but still shedding clouds of the Wuhan virus, and this continued inhalation of the virus is what those older teachers fear almost to the point of phobia.
The teachers can wear masks if they like, even full PPE if that makes them less uncomfortable. But this looks more and more like a strike issue.
Part of it. They also want to keep the economy down in an effort to get rid of President Trump.