We kept schools going right up til lockdown, when Covid was widely spread across the general public.
And yet there have not been reports of a high proportion of teachers becoming ill.
Schools are normally viral swamps, so if children were commonly capable of spreading the virus, then you would expect more teachers to become ill than a random sample of the population.
Research seems to be reaching the same conclusion based on the virology of covid.
So lets get schools open...
... except that doesn't mean that there will be zero risk, and too many people seem to be holding out for a magical zero risk scenario.