Many people could have been exposed to rabies after a colony of bats was found residing in the attic of a lodge at Grand Teton National Park in Wyoming. So far, none of the bats discovered in some of the cabins at Jackson Lake Lodge have tested positive for rabies, according to CNN.

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.