growstuff, yes, it does seem a very sudden concern (and often quoted reason for schools reopening). It reminds me of the concern for the homeless - only at Christmas!
Of course, there's the majority of time (mornings, evenings, weekends and holidays) away from school, when disadvantaged and abused children suffer too, perhaps most.
Social workers have often found home visits impossible during lockdown. An awful lot of parents have had 'symptoms' and are 'self-isolating'. There was a rush to place the most vulnerable into foster care before lockdown began.