National Park Service (NPS) Intermountain Regional Director Sue Masica signed a Record of Decision (ROD) to not implement a remote vaccination program to address brucellosis in Yellowstone Bison. The remote vaccination method would have meant using a rifle-delivered bullet with a vaccine payload.

Yellowstone National Park spokesman Al Nash says after studying the method, the National Park Service has concluded that the implementation of remote vaccination at this time would not substantially suppress brucellosis in Yellowstone bison and could have unintended adverse effects to the bison population and reduce wildlife viewing opportunities.

The decision continues the currently authorized syringe vaccination of bison calves and yearlings periodically captured at the northern boundary of the park.