CHEYENNE, Wyo. (AP) — The city-county health departments in Wyoming's two largest communities are out of influenza vaccine at what may be the peak of this year's nasty flu season.

Health officials in Laramie County said Friday they don't expect to get more from the vaccine manufacturers, but that doesn't mean the flu situation is dire in southeast Wyoming.

They say the Cheyenne-Laramie County Health Department had a successful flu vaccine campaign that immunized some 4,000 people. That's not counting those who got immunized at clinics and retail stores, and many of those locations still have vaccine.

The Casper-Natrona County Health Department also is out of flu vaccine.

State health officials say this is the worst flu season in three years but there are signs that flu season may have peaked in Wyoming.