Baby botulism outbreak: FDA still doesn't know cause—or how to prevent it

A multistate outbreak of infant botulism affected 48 infants across 17 states and was linked to ByHeart Whole Nutrition infant formula . The CDC declared the outbreak over on February 26, 2026 , though the FDA's investigation into the root cause remains ongoing with focus on ingredients . While Clostridium botulinum was identified in a powdered milk ingredient, no additional factors explained the cause of the outbreak .

Source: Ars Technica | 2026-06-05