A recent study of cancer patients in Finland and Sweden found no association between survival rates and whether people were positive or negative in their outlook. The study, in the American Journal Of Epidemiology, looked at 4,600 people with cancer over 30 years, and found that whether they were extrovert or neurotic, their attitude to life had no relationship with how long they survived their illness. So staying positive is not going to improve the body's response to a disease like cancer. I think this is an important finding, as I guess some of us have seen how easy it is to "blame the patient". What they didn't test though is if you can enjoy your life better when you try to maintain a positive attitude despite having a chronic illness.