In Iceland, they did extensive testing, and genetic tracing of infections.

Children infecting other children was extremely rare. In almost all cases, it was adults infecting them.

There was only a single case of a child infecting an adult.

https://www.sciencemuseumgroup.org.uk/blog/hunting-down-covi...

Now that we have actual experience with the disease, hospitalization rates for children with covid is 5x lower than flu.

As pediatricians have noted, focusing only on covid risks leaves a whole host of other more serious risks with no management.