Over-the-counter cold & flu medicine on the shelf at Walgreens in Phoenix Ariz. on Wednesday, January 11, 2017. (Photo by Blake Hemmel/Cronkite News)

Widespread flu activity has made the 2017-18 season one of the worst in years, especially in Arizona. Every county in the state has confirmed an influenza case this season, and about 19,000 more Arizonans have been infected compared with last year. The middle-aged and elderly in particular are being affected more than normal.

Follow us on Twitter.

Creative Commons License

Republish our articles for free, online or in print, under a Creative Commons license.