Charlie Is a Hypochondriac

Charlie is a hypochondriac. Heʹs always worried he has something. Is that cough an early sign of lung cancer? Heʹs thirsty; is it diabetes? He canʹt shake hands because he might pick up flu germs. He disinfects everything. Yet, despite his almost obsessive precautions, he comes down with one bug after another. Can you give a plausible explanation?

A) Charlie is producing too much growth hormone, which is exhausting his system.
B) Heʹs just imagining that he is sick.
C) Stress releases cortisol, and cortisol suppresses the immune system.
D) Charlie has a goiter, which is increasing his immune response.
E) The cough indicates that he is probably diabetic and that makes him susceptible to illness.