A multistate outbreak of infant botulism linked to ByHeart Whole Nutrition infant formula has been identified in the United States. As of November 11, 2025, Idaho has no cases associated with the outbreak, but 15 infants with suspected or confirmed infant botulism have been reported by 12 other states. All 15 infants were hospitalized and treated with BabyBIG® (Botulism Immune Globulin Intravenous medication). No deaths have been reported.