What effect does high stress have on the immune system?

High stress has a significant effect on the immune system, and the chosen answer highlights that it weakens the immune system. When an individual experiences high levels of stress, the body produces stress hormones such as cortisol. While these hormones can be beneficial in short bursts by aiding the body's response to immediate threats, chronic stress leads to prolonged elevated cortisol levels. This can suppress the immune response, making the body more susceptible to infections and reducing the effectiveness of vaccinations.

Additionally, high stress can lead to unhealthy coping mechanisms such as poor diet, lack of exercise, and inadequate sleep, further compromising immune function. By understanding that high stress weakens the immune system, individuals can take proactive measures to manage stress effectively and support their overall health.