Least Vaccinated U.S. Counties Have Something in Common: Trump Voters

Actual vaccination data has revealed a pattern similar to what polling and the federal estimates have shown. The Times analyzed data from the Centers for Disease Control and Prevention and the U.S. Census Bureau and found a party split that was significant, though smaller.

In counties where a majority of residents voted for Mr. Trump in the 2020 election, adult vaccination rates were lower, on average, than in counties where a majority of residents voted for Mr. Biden. The rate was especially low in counties where Mr. Trump dominated, falling below 1 in 4 residents in counties where the former president won by a margin of 50 or more points.

The divide in vaccination rates remained even after accounting for a variety of factors, including infection rates, population density and educational attainment.