UC Merced Undergraduate Research Journal

The current understanding of the evolutionary emergence of the immune system in organisms is still unclear to this day. It is acknowledged that some aspects of the immune system definitely improved the survival of living organisms, whether it be plant, or bacteria, vertebrates or invertebrates. The different immune proteins and complexes are constantly being studied to understand exactly how the immune system play a role in the human development. In this review, we proposea developmental and evolutionary explanation to how we present an immune system, understand the selective pressure in immune cells, explain the relationship of bacteria or viruses to their host, and analyze the augmentation of human vulnerability to diseases.