Jillybird you are right, it will be quite difficult for teachers and TAs to fully socially distance with very young children. I used to teach young children, I taught Nursery class, Reception class, and both Year 1 and Year 2 at various times during my teaching career. We were advised to never touch the children, nothing to do with Coronavirus or infection control, and everything to do with safeguarding, and protecting ourselves from unfounded accusations. It was difficult, but not impossible. If I was still teaching, and perhaps teaching the Nursery class, that’s the pre school year in a school, so 3-4 year olds, I would wear a face mask, and possibly a visor. If a child fell over I would put gloves on (we already did this when dealing with blood) and sit the child on a chair and wash the would. I would soothe the child with words, not cuddles. I would dress the wound if necessary and suggest a quiet activity until the child felt better. It is possible to take care of other people’s children without cuddling them. But pretty well impossible to socially distance at two metres from them.
You may be reassured that there has not been a single teacher world wide who has contracted Covid19 from a pupil and died as a result of it, as far as I understand it.