Hetty My comments are about the probability of someone coming into contact with someone with the virus, not its catchability. That probability will vary from very low in rural areas and many suburbs to exceptionally high in care homes.
Speaking to friends, family and neighbours, only one, who is a city dweller knows anyone who has had the disease, let alone died from it. Even in the suburbs of a city, it was a parent of a friend of a child, the family were secluded for a fortnight, but despite the two children, both aged 9, being physically very close for two days, there was no transmission to that child or his family, nor did the friend whose father had the illness pick it up either. The disease is really very rare in children.
If every adult who as a child inadvertently passed on an infection to a grandparent or other vulnerable person was to spend their adult live punishing themselves, then most of the population would be in that situation and no caring parent would ever allow any contact between a child and grandparent over 70.
As I said it is the perception of relative risk. that I think is eluding people, not infectability. Nor am I other than supportive of the shutdown.