Another interesting point concerning IBD and countries where people are more exposed to parasites is that those countries are developing countries and have less or no consumption of antibiotics and pharma drugs in general. Nor do they have a typical western diet high in refined carbohydrates,high sugar intake,processed foods,and less industrial chemical exposure. These factors would seem more likely the reason why there is no incidence of IBD. High stress levels in developed countries will also contribute to weakening the immune system.I do not buy the HH. I believe the reason much more simple ,as the above.