Optimism and immunity: do positive thoughts always lead to positive effects?

  title={Optimism and immunity: do positive thoughts always lead to positive effects?},
  author={Suzanne C. Segerstrom},
  journal={Brain, behavior, and immunity},
  volume={19 3},
The effects of dispositional optimism, as defined by generalized positive expectations for the future, on physical health are mixed, especially in diseases that can be immunologically mediated such as HIV and cancer. Both experimental and naturalistic studies show that optimism is negatively related to measures of cellular immunity when stressors are difficult (e.g., complex, persistent, and uncontrollable) but positively related when stressors are easy (e.g., straightforward, brief, and… CONTINUE READING
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