James Goding; Week 10 MED1011; Immunology
Virulence and transmissability are two main factors for epidemic. Three essential features of immunity are specific recognition, memory and action. Genetic polymorphism is important for immunology, is valuable due to variation in populations. Evolutionary bottlenecks can allow only the fittest to survive, or a species immune to a virus, decreases polymorphism. Self and nonself is the most important distinction in immunity. Failure of immune system to react to self is tolerance.