Baby formula manufacturer ByHeart recalled all of its products sold nationwide Tuesday. The move comes days after some batches were recalled amid an expanding outbreak of infant botulism. According to state and federal health officials, at least 15 babies in 12 states have been sickened in the outbreak since August, with more cases pending. All the infants were hospitalized after consuming ByHeart formula. Parents and caregivers who have the formula in their homes should immediately stop using it and dispose of the product. Babies with symptoms of infant botulism need immediate medical care.