Pharmacy says flu widespread in parts of Texoma.

DALLAS, Tex. (KXII) - The Walgreens flu index shows parts of texoma are experiencing some of the highest incidence of flu in the country.

The Walgreens Flu Index provides state and local information regarding flu activity. The list uses prescription data for antiviral medication used to treat the flu.

The Tyler-Longview area tops the list, followed by the Dallas/Ft. Worth Metroplex.

Texas ranks third in the nation for flu acticity, behind Nebrasjka and Mississippi.

Oklahoma ranked 8th.

The Flu Index is not intended to illustrate levels or severity of flu activity, but rather, illustrate which populations are experiencing the highest incidence of flu.

The data used does not include markets which have fewer than 10 Walgreens retail locations.