[4gotunameagain]

https://doi.org/10.1016%2Fj.cobeha.2019.01.009

https://doi.org/10.1016/j.ejon.2003.09.003

https://doi.org/10.1080/16506078809455814

https://doi.org/10.1037%2F0033-2909.130.4.601

[master-lincoln]

the last link is the same study I linked to come to the opposite result of you :D

[4gotunameagain]

Why do I read the opposite?

  Brief naturalistic stressors (such as exams) tended to suppress cellular immunity while preserving humoral immunity. Chronic stressors were associated with suppression of both cellular and humoral measures  

  The more a stressor deviated from those parameters by becoming more chronic, however, the more components of the immune system were affected in a potentially detrimental way.