One of the most interesting topics I explored in immunology was how autoimmune diseases like multiple sclerosis (MS) arise when the immune system mistakenly targets the body’s own tissues—in this case, the nervous system. As a psychology student with a strong interest in neuropsychology, learning about MS helped me see how immunological dysfunction can directly affect cognitive and behavioral outcomes. Understanding the immune mechanisms behind MS gave me a more complete picture of how neurological disorders develop and why they can be so difficult to treat. We also discussed how vaccines train the immune system to recognize and respond to threats without causing illness, which reminded me of the psychological principles behind learning and memory. Making these connections across biology and psychology not only deepened my understanding of the immune system but also helped me think more holistically about human health. This course definitely pushed me to integrate knowledge across disciplines and see the value in understanding complex systems from multiple angles.