It is generally believed that maintaining an optimistic attitude will promote health  However, a ten-year follow-up study of 70,000 women in their 50s found that subjects who maintained an optimistic attitude for a long time and pessimistic subjects had  no difference in mortality rate
The pessimistic people in this study are more likely to have chronic diseases, although they are not severe enough to be fatal.
 Researchers believe that optimism has nothing to do with health