Tracking COVID-19 Booster Doses in the US States

December 22, 2021

Tracking COVID-19 Booster Doses in the US States
Matthew A. Crane, John A. Romley, Ruth R. Faden

 This post reflects information on COVID-19 vaccination rates collected most recently on December 20, 2021.

On November 19, 2021, the Centers for Disease Control and Prevention (CDC) expanded recommendations for COVID-19 booster shots to include all adults over the age of 18. With the recent spread of the SARS-CoV-2 Omicron variant in the United States, public health authorities have increasingly emphasized the importance of being fully vaccinated and boosted for protection against COVID-19.

In order to track rates of booster doses in the United States, we conducted an analysis of CDC data on state-level variations in booster shot coverage. We examined a 9-week period during the booster rollout from October 24, 2021 to December 19, 2021. In this analysis, additional doses as termed by the CDC were considered booster doses. Our analysis only accounts for individuals over the age of 18.

The Video below depicts state-level variation over time, and Table 1 provides a summary of the state-level data. In Table 2 we provide results for individual states. This analysis finds substantial differences between state-level booster coverage, with states ranging in coverage from 10.6% (New Hampshire) to 49.5% (Vermont).

Video: Booster Doses over Time in the United States (as of 12/20/21)

Table 1. Summary of State-Level Booster Vaccination Rates (as of 12/20/21)

Percent of Adult Population with Booster Dose States
>10%-20% NH, HI, WV, NC
>20%-30% PA, DC, AL, GA, MS, TX, NV, LA, OK, AZ, UT, AR, FL, SC
>30%-40% NY, CA, NJ, KS, MO, TN, DE, SD, IN, KY, AK, WY, VA, ID, WA, ND, MD, MA, CT, IL, OR, OH, NE, NM, MT
>40%-50% RI, CO, MI, ME, IA, WI, MN, VT


Table 2. State-Level Booster Vaccination Rates (as of 12/20/21)

State Percent of Adult Population with Booster Dose
Vermont 49.5
Minnesota 47.1
Wisconsin 43.7
Iowa 43.2
Maine 42.2
Michigan 40.9
Colorado 40.5
Rhode Island 40
Montana 39.7
Nebraska 39.6
New Mexico 39.6
Ohio 39.4
Illinois 37.5
Oregon 37.5
Connecticut 37.2
Massachusetts 36.9
Maryland 36.7
North Dakota 36.5
Washington 36.1
Idaho 35.9
Virginia 35.6
Wyoming 35.4
Alaska 35
Kentucky 34.7
Indiana 33.8
Delaware 33.7
South Dakota 33.7
Missouri 33.3
Tennessee 33.3
Kansas 33
New Jersey 32.4
California 32.2
New York 30.5
Arkansas 29.9
Florida 29.9
South Carolina 29.9
Utah 29.4
Arizona 29.3
Oklahoma 29.1
Louisiana 28.9
Nevada 27.7
Texas 27.3
Mississippi 26.3
Georgia 25.9
Alabama 25.8
District of Columbia 25
Pennsylvania 23
North Carolina 19.7
West Virginia 18.9
Hawaii 18.3
New Hampshire 10.6