Yes, results do vary. People will react differently, and at this time there isn’t any way to predict who will be helped. All people can do is to cite averages, and with hookworms the overall results are about 80% for many autoimmune disorders. Ulcerative colitis is an exception to this rule; hookworms don’t seem to be very effective for this condition. So whipworm is likely a far better organism to try in this situation. Fibromyalgia is another example of a condition that doesn’t seem to be helped by hookworms, no doubt there are more.