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The estimate is around 70-80% for pretty much every country in the world at the moment. Not sure what you mean, China didn't contain anything, they're slowing down the spread fairly well at the moment but that's about it. Containment phase in most affected countries is way over.
But have to keep in mind aswell, that this is only based on reported cases. Expert estimates are 10x of reported cases are actually happening. Children get very minor if any symptoms so they most likely will never get reported etc.
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