Optimism is associated with mood, coping, and immune change in response to stress.

@article{Segerstrom1998OptimismIA,
  title={Optimism is associated with mood, coping, and immune change in response to stress.},
  author={S. Segerstrom and S. Taylor and M. Kemeny and J. Fahey},
  journal={Journal of personality and social psychology},
  year={1998},
  volume={74 6},
  pages={
          1646-55
        }
}
This study explored prospectively the effects of dispositional and situational optimism on mood (N = 90) and immune changes (N = 50) among law students in their first semester of study. Optimism was associated with better mood, higher numbers of helper T cells, and higher natural killer cell cytotoxicity. Avoidance coping partially accounted for the relationship between optimism and mood. Among the immune parameters, mood partially accounted for the optimism-helper T cell relationship, and… Expand
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