Oklahoma No. 1 in flu activity in weekly Walgreens index

The weekly Walgreens Flu Index has been released for the week that began on Jan. 26, with Southern and Western states reporting the greatest activity.

Oklahoma City reported the most activity for the week, followed by San Antonio; Tulsa, Okla.; Little Rock-Pine Bluff, Ark.; and the El Paso, Texas-Las Cruces, N.M. region. Oklahoma also was the top state for flu activity for the week.

San Antonio saw the sharpest rise in flu activity compared to the previous week, followed by Tulsa, Little Rock-Pine Bluff, Oklahoma City and Austin. Oklahoma was the top state for flu activity gains during the same timeline, with Arkansas, Texas, New Jersey and Nevada rounding out the top five.

The index helps drive consumer awareness and prevention within communities and often is used as a resource by health departments, news media and other entities at the local level.

The index, compiled using data on weekly retail prescription order volume for antiviral medications used to treat the flu across Walgreens' locations nationwide, is analyzed at state and geographic market levels to measure the absolute impact and incremental change of antiviral medications on a per-store average basis. It does not include markets in which Walgreens has fewer than 20 retail locations and is not intended to demonstrate levels or severity of flu activity, but to illustrate generally which populations are experiencing the highest incidence of the virus.