A very sensible theme, Chronic Wasting Disease, the USA endemic version of mad cow disease in wildlife and hunting bovines . Consider the Wyoming map, a gaming hunting state. https://wgfd.wyo.gov/Wildlife-in-Wyoming/More-Wildlife/Wildlife-Disease/CWD-in-Wyoming-Wildlife/CWD-Map Almost all its territories are contaminated by the disease. Some US official sites begin to mention the possible risks for hunters (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3323184/) but the most sensible articles had been removed. As a precaution, hunters in those zones affected with the disease should not be allowed to sell their plasma either admitted for blood donation. https://www.cdc.gov/prions/cwd/occurrence.html