Walgreens Flu Index for Week Ending December 30, 2017

The Walgreens Flu Index™ is a weekly report developed to provide state- and market-specific information regarding flu activity, and ranks those states and markets experiencing the highest incidences of influenza across the country.

The Flu Index provides valuable insight by showing which cities or metropolitan areas are experiencing the most incidences of influenza each week based on Index methodology. The data does not measure actual levels or severity of flu activity.

With the ability to generate hyper-local data across most U.S. markets, the Flu Index is an online, interactive resource allowing anyone to search and find information regarding the most current state of influenza in their community.

To view this week’s Walgreens Flu Index, maps and other online features, including the ability to search by market name or state, click here.

Top 10 DMAs* with Flu Activity

Week Ending 12/30/17
1. Tyler-Longview (Lufkin & Nacogdoches), Texas
2. Harlingen-Weslaco-Brownsville-McAllen, Texas
3. Waco-Temple-Bryan, Texas
4. Houston, Texas
5. Beaumont-Port Arthur, Texas
6. Corpus Christi, Texas
7. El Paso, Texas (Las Cruces, N.M.)
8. San Antonio, Texas
9. Dallas-Ft. Worth, Texas
10. Little Rock-Pine Bluff, Ark.

Top 10 States with Flu Activity

Week Ending 12/30/17
1. Texas
2. Arkansas
3. Iowa
4. West Virginia
5. Nebraska
6. Idaho
7. Tennessee
8. Arizona
9. Missouri
10. North Carolina

Top 10 DMAs with Flu Activity Gains

Week Ending 12/30/17

1. El Paso, Texas (Las Cruces, N.M.)
2. Des Moines-Ames, Iowa
3. San Antonio, Texas
4. Montgomery-Selma, Ala.
5. San Diego, Calif.
6. Reno, Nev.
7. La Crosse-Eau Claire, Wis.
8. Phoenix (Prescott), Ariz.
9. Lafayette, La.
10. Wausau-Rhinelander, Wis.

Top 10 States with Flu Activity Gains

Week Ending 12/30/17
1. Iowa
2. Arizona
3. Connecticut
4. California
5. Nebraska
6. South Dakota
7. Wisconsin
8. Minnesota
9. Kansas
10. Alabama


The Walgreens Flu Index™ is compiled using weekly retail prescription data for antiviral medications used to treat influenza across Walgreens and Duane Reade locations nationwide, including Walgreens locations in Puerto Rico. The data is analyzed at state and geographic market levels to measure absolute impact and incremental change of antiviral medications on a per store average basis, and does not include markets in which Walgreens has fewer than 10 retail locations.

*Designated Market Area