[jhu247]

> China's strategy seems simple enough. Close off borders of a region

Have a couple of issues with your points.

1. China did not close its borders soon enough, even though the government was aware of the possibility of a large scale incident. This led to the virus's spread to every other continent other than Antarctica. 2. China has the "benefit" of a central government with a citizen database where privacy has no consideration. Combine that with mostly vertical housing, it's easy to make sure no one is able to go outside except for those selected to be a resource liaison. This is impossible in a place like California.