Over a century ago (Pasteur developed the Germ Theory of disease in 1861, but it took a while to catch on) we have done everything we could to find and destroy microorganisms. By doing so we have unleashed an unholy deluge of toxic chemicals on our planet. His contemporaries, Antoine Bechamp and Claude Bernard, posited another theory of Biological Terrain, but until only a few decades ago scientists and healthcare professionals ignored the beneficial microbiome. Now we are learning its essential role in health and resistance to disease.
We are all children of this notion that we need to maintain sterile, or nearly sterile (i.e. germ-free) conditions to maintain health. This belief has not helped us. It turns out that most of the microorganisms (viruses, bacteria, fungi) in our bodies keep us healthy and disease free. Trying to stay germ free seems to have a relationship to chronic diseases, especially autoimmune disease.