The lack of international political response, the politicization of the crisis, leads to less efficiency, to longer shutdowns, and extensive economic impact.

In the US: governors and mayors are doing different things. If decisions on what is or is not an essential good differ from state to state, it's hard to put together a supply chain for goods produced across states. The implications are larger. You can shut down all of California, but if you don't have control over the state borders (and you don't), people can move. What happens when you try to restart, & there are outbreaks in other states?