Final answer:
When people feel unable to control their environment, it can lead to chronic stress, which can inhibit immune responses. In Jason's case, the long-term stresses he is experiencing can increase his vulnerability to diseases and infections, resulting in a decreased immune response.
Step-by-step explanation:
When people feel unable to control their environment, it can lead to chronic stress, which can inhibit immune responses. This means that a person's immune system may be less effective in fighting off infections and diseases. In Jason's case, the long-term stresses he is experiencing can increase his vulnerability to diseases and infections. Therefore, the most likely thing happening to Jason is that his immune response is dropping.