Federal and state health officials are investigating 13 cases of infant botulism linked to ByHeart Inc.'s Whole Nutrition Infant Formula. The recall includes two specific lots (206VABP/251261P2 and 206VABP/251131P2), which were sold online and at major retailers, accounting for about 1% of the nation's formula sales. Infants from multiple states including Arizona, California, and Texas have been hospitalized, although no fatalities have occurred. The FDA is currently investigating the source of the contamination and if other products are affected. Parents are urged to check product lot numbers, clean surfaces that came into contact with the formula, and seek medical help if infants show any concerning symptoms related to consumption. Symptoms of infant botulism may take weeks to present, so vigilance is essential.