States With the Worst COVID-19 Vaccination Rates

While the spread of the highly contagious delta variant of the coronavirus throughout the U.S. has begun to slow, regions with large populations unvaccinated against COVID-19 continue to be hit the hardest.

Data from USAFacts shows that there are still two states where less than 50% of the total population has received a first dose of the COVID-19 vaccine, while in some states over 80% of the population has been partially vaccinated as of Nov. 9. The data also shows that 40 states and the District of Columbia have a fully vaccinated population of 50% or more.

These are the 10 states with the lowest partial vaccination rates in the country, according to the most recent data:

1. West Virginia (49.21%)
2. Idaho (49.65%)
3. Wyoming (51.63%)
4. Mississippi (52.59%)
5. (tie) Louisiana (54.24%)
5. (tie) Indiana (54.24%)
7. Alabama (55.00%)
8. Tennessee (55.02%)
9. North Dakota (55.67%)
10. Ohio (56.29%)

Seven-day average cases nationwide have been dropping since September after a sharp increase in cases and deaths over the summer as the delta variant spread. States that have vaccination rates lower than the national average often have higher COVID-19 case rates.

County-level data shows that vaccination rates within states can vary significantly. Daily updates from the Centers for Disease Control and Prevention provide a look into full and partial vaccination rates at the county level.

Around 67% of people in the U.S. have received their first dose of the COVID-19 vaccination, and 58% of the population is fully vaccinated.