Babies are constantly putting things in their mouthes. In classes for raising newborns, nurses and teachers always talk about checking your floors to make sure there is nothing that the child can fit into their mouth and choke on. Choking is a big concern, but some parents also are determined to raise their kids in an ultraclean environment. By not allowing children to get a little dirty, these parents might be preventing them from developing their immune systems to respond to allergies, asthma, and other autoimmune diseases.

_
_