The United States doesn't have effective federal pandemic laws. The federal government looks to the states to manage their own health arenas and in those states

The United States doesn't have effective federal pandemic laws. The federal government looks to the states to manage their own health arenas and in those states many allow county level health departments to run with the ball. This is how you end up with one state doing x and another state next door doing y. It even gets to the county level with a county in a state doing x and the county next to it doing y during a pandemic. The CDC lost the battle before it began. It was heartening to see everyone sort of pull together to flatten the curve, but with what has happened during the phased reopenings, you'll never have American citizens do it again voluntarily.