How many people that you know get frequent colds? Have allergies? Candida fungal infections? Or cancer, or any one of a number of immune or autoimmune illnesses?  If you’ve read Raymond Francis’ books, you may recall that people living in healthy traditional cultures regularly lived into their hundreds without getting a single cold or flu, let alone cancer. But weak immunity is common these days, and how could it be otherwise?  When people stayed in one place, their immune systems adapted to local pathogens.  Now we travel all over the globe, exposing ourselves to exotic pathogens and carrying these infectious agents to yet other locations. Though our lives are made richer by exposures to other cultures, our immune systems are continually bombarded with novel viruses, bacteria, fungi and parasites from all around the world. Meanwhile, most of us have taken antibiotics, which permanently weaken our immunity.  About 80% of the immune system resides in the int…