I think you're copy-pasting China's literal response into some hypothetical other culture that isn't being clearly explained, which isn't useful for those of us

I think you're copy-pasting China's literal response into some hypothetical other culture that isn't being clearly explained, which isn't useful for those of us that can't read your mind. Concretely, the US CDC for example prefers setting up physically separate internment camps and moving infected populations there for quarantine. And they can easily get the backing of federal military resources or, in the case of a state governor declaring a state of emergency, the state's National Guard to enforce this. It could get ugly, but only for a few zealots. Modern history (20th century til now) shows that a majority of Americans are generally willing to give up civil liberties in emergencies that relate to "national security" or "think of the children" causes. Edit: And of course curfew laws can be directed by a state government during a state of emergency, or federally during a state of emergency from the Public Health Service Act, and enforced by military forces.