Poland in a nutshell:
early September: "we can shove all our kids back into school" (about 500ish new cases daily)
early October: "there's an increase but it's all under control, stay in school" (about 750ish new cases daily)
right now: OH GOD WHAT IS HAPPENING (13,5k new cases today)
Yes, I'm afraid that funelling down everyone's children who have no idea how or why should they wear masks, manically clean their hands, social distance and avoid every possible infected surface, or honestly don't give a heck about that, into tightly packed rooms tightly packed inside a building where keeping any semblance of distancing, hygiene and infection spreading prevention is a fever dream at best brought us here.
It's reported that the vast majority of new infections are happening between close family members, which is obvious (especially if the child brings covid from school).
Why do I think schools are the largest cause for this second wave? Because we were keeping a very steady and quite soft means of limiting the spreading of the virus up until a couple weeks back - the only thing that changed is school year starting.
We're slamming the brakes as hard as we can right now, with basically all of tourism/travel going into shutdown, heavy limitations of gastronomic services, and all the traditional means, for example disallowing meetings of more than 5 people at a time. Not like we're going to see any effects for a couple weeks.
When I'm going to work, I at least get paid for it. These kids are forced to risk infection of their entire families because, well, this is how we do it here our system needs a steady influx of indoctrinated young people happily wagging their tails when the system gives them back a tiny piece of what it took from them earlier.