Botulism spores do not "train immune systems". Babies don't have strong enough digestive systems until they're at least six months old to kill the spores. http

Botulism spores do not "train immune systems". Babies don't have strong enough digestive systems until they're at least six months old to kill the spores. https://www.cdc.gov/botulism/infant-botulism.html https://www.cdc.gov/botulism/infant-botulism.html.