Honey contains Clostridium botulinum spores which can grow and release toxins in an infant’s intestines, causing infant botulism. It is the most common category of botulism, affecting 150 infants in 29 states and the District of Columbia, according to 2016 data from the Centers for Disease Control and Prevention National Botulism Surveillance summary. https://publications.aap.org/aapnews/news/13225/Remind-families-honey-can-cause-infant-botulism