The symbiotic beneficial side effects of parasites

Can we duplicate the effects without being infested? [Link]

Technology Review reports mounting evidence in both humans and animals suggests that infection with these parasitic worms seems to protect against a number of inflammatory diseases, including asthma and allergy, multiple sclerosis, Crohn's disease, and type 1 diabetes

We became dependent on helminths [parasitic worms] and made ourselves vulnerable to immunologic diseases. A number of epidemiological studies have shown that people infected with parasitic worms suffer less from allergies and other immune diseases, and research in animal models designed to mimic these diseases supports these findings. The rise in allergies and other ailments in rich countries over the last few decades has been matched by a decrease in parasitic worm infection, among other factors. Researchers found that people with parasitic infections have these unique protein fragments in their bloodstreams, while unaffected people have few or none.