Stress and the Human Immune System.
Hans Selye defines stress as the wear and tear of the body. Prolonged stress or chronic stress can lead to the wear and tear of the immune system. In his model, which is known as the General Adaptation Syndrome (GAS), he described the body’s response to stress in three stages which are:Alarm reaction, Resistance And Exhaustion. The first stage is what stirs the body for fight-or-flight response. The second stage is due to the recurrence of the first stage and if it persists, cortisol (...