We can't at all compare ourselves with China.
For starters, we can't trust their numbers. With their control of media and the internet, I would not be surprised to hear it leaked that scores are dying. They are excellent at covering up the truth.
Besides that, we have an entirely different social structure here as Disoblige said. In China, you do what the government tells you. If you don't, you won't like the consequences. When China shuts down, they shut down.
In Canada: We ask you stay indoors. We urge you. Please. Prwtty please. People in North America are having covid parties for fucks sake. That's the extreme, but citizens in Canada and especially in the USA have varying degrees of concern which leads to varying degrees measures taken and therefore varying degrees of infection risk. A virus grows exponentially so it doesn't take a lot to keep it going.
My kid is back in school. Not nearly enough precautions are being taken. I fully expect it to rip through our schools in the winter.