[adamrezich]

people live in cities/towns/etc. which are exist in counties which exist in states. the data is per-county. vaccination policies/attitudes are largely defined by governors, who lead states. states often have a shared culture, but sometimes different parts of states have varying cultures.

often, population density affects culture/attitudes toward these sorts of things. as with many such maps, adding an additional analysis layer denoting population density would yield interesting results. (though if you intuitively know the population densities of various "outlier" states, and you know where major cities are in the lesser-populated states, you can already intuitively draw some correlations yourself.)