ByHeart infant botulism outbreak ends with 48 babies sickened

A container of ByHeart baby formula, in Flagstaff, Ariz., on Wednesday, Nov. 12, 2025. (AP Photo/Cheyanne Mumphrey, File)

A rare outbreak of infant botulism that sickened dozens of babies who drank recalled ByHeart formula is over, with no new cases reported since mid-December, the U.S. Centers for Disease Control and Prevention said Thursday.

In all, 48 babies were sickened since 2023. That’s actually down from the previous case count, because three infants were ultimately diagnosed with other illnesses not tied to botulism, health officials said.

All of the children who got sick were hospitalized. No deaths have been reported.