The number of infant botulism cases tied to baby formula has climbed to 15. Here's what to know Updated 22 mins ago A California health official says an outbreak of botulism tied to ByHeart baby formula has now sickened at least 15 infants in 12 states. No deaths have been reported. The most recent cases were confirmed in November. Consumers should stop using ByHeart powdered infant formula immediately. ByHeart officials this weekend recalled two lots of the company's Whole Nutrition Infant Formula. Botulism is a rare but serious disease that can cause paralysis and death. Symptoms can take weeks to develop.

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