As of right now, children do not appear to transmit it as readily, at least in school settings. Is this because in school they are better at social distancing

As of right now, children do not appear to transmit it as readily, at least in school settings. Is this because in school they are better at social distancing protocols? Maybe. Is it because they are less infectious on average? Maybe. There are also reports that the new SA/British variants may change this situation.