Ole-crone, there is a study that farm children have FAR fewer allergies than any other group of children, and it's because they are exposed to lots of dirt, manure, bacteria etc very young, and therefore their bodies learn early to "recognize" the difference between harmful and non-harmful entities. Whereas allergies are reactions to things that are NOT harmful, but the allergic person's body does not recognize that they are not harmful.
Anyone else ever heard of this?
I read about it in National Geographic recently because they are now doing longer term studies on farm children and allergies.
They suggest that a typical household has too FEW germs, dirt, bacteria, pollens, etc, and that children are more likely to get allergies in a super-clean environment.