This is why officials in many states, even ones that were gung-ho social distancing like California and Washington, were reluctant to close the schools. It was predicted that a large number of kids would instead just be congregating together on streets, defeating much of the point of closing the schools. But they were caught between a rock and a hard place. If they didn't close the schools, the kids become an infection vector that undoes much of the sacrifice of having people wfh, avoid social gatherings, and cancel large events.