The chances of getting infected are higher indoors. Which makes classrooms potentially dangerous places. Especially since one teacher cannot ensure social distancing and mask-wearing at all times. Although the chances of kids developing serious cases are less, the disease does severely affect children with immunity deficiencies. Kids are transmitters, even if they are asymptomatic. Beta Stadler, a Swiss biologist, recently claimed that there is no such category as "asymptomatic" when it comes to Covid-19. He argues that no symptoms means no infection, which doesn't at all explain the huge percentage of cases that have turned out to be asymptomatic. We can't explain away these instances using the "false positives" argument. Reopening schools hurriedly will result in more deaths. Parents, teachers, and the elderly who interact with students at close quarters will be at high risk.
Sociologists and public health experts have been saying this for a long time now: improve healthcare spending and make public healthcare robust; segmented healthcare cannot be the answer (See: Society: The Basics). Even the UK and US, countries cited as examples of good public healthcare systems, have fallen short.
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