Other experts believe the newer vaccine, RB51, should be perfected for bison and that it should be used. Given that bison are not affected by brucellosis, and that they have lived with the disease for 80 years and never transmitted it to cattle, there is no urgent need to begin vaccinating bison. Once safety and efficacy tests are concluded, the best safe and effective vaccine should be used. All states except Montana have accepted this definition. This is the key factor which has made the disease problematic for Montana.
Sanctions cause Montana to lose cattle markets and to incur unnecessary expense.
The federal government should pursue means available to it to prevent individual states from imposing unwarranted sanctions that interfere with interstate commerce.