Your immune system gives some protection against botulinum, but it doesn’t fully develop until about six months to a year old. This is why you should never ever feed honey to an infant. Bees will occasionally end up on the ground, picking up botulinum. There’s a very small chance of a trace of the bug ending up in honey. It’s not enough to harm an older child or adult, but even thst tiny amount can kill a baby.

https://www.who.int/news-room/fact-sheets/detail/botulism