Is it not important to consider the risks to adults associated with the schoolchildren and older schoolchildren , or are they acceptable collateral damage? be careful what you say here...
Of course it is but at some point kids have got to go back to school, end of story.
The biggest risk factor, over everything else, is age. The most affected age group by far are the over seventies. The risk to a 50 year old teacher is still pretty negligible.
I don't disagree there were safer ways of doing but I am not convinced that blended learning/part-time schooling is the way to go.