Health officials are working to alert hundreds of people in dozens of states and several countries who may have been exposed to rabies in bat-infested cabins in Wyoming’s Grand Teton National Park over the past few months.

As of Friday, none of the bats found in some of the eight linked cabins at Jackson Lake Lodge had tested positive for rabies.

But the handful of dead bats found and sent to the Wyoming State Veterinary Laboratory in Laramie for testing were probably only a small sample of the likely dozens that colonized the attic above the row of cabins, Wyoming State Health Officer Dr. Alexia Harrist said.