Defense is a state in which the body is protected from infectious disease. The state provided by the immune system, cells, tissues, and a complex network of chemicals that fight infection and kill infectious organisms when they invade the body. There are three categories of immune protection, all of which help protect the body from infectious diseases are. Innate or acquired immunity, active or passive and may be natural or synthetic. These categories to the mix and match production, for example, can natural or artificial passive passive safety of congenital or acquired immune protection.The class type of immune response mounted by the immune system refers to is. An innate immune response to pathogens is not specific to the system to work, and it almost immediately when an infectious organism's body is attacked. In contrast, an acquired immune response is specific to the pathogen and can take several days to make. Acquired immune response involves the development of immunological memory, a state in which the immune system quickly it already suffered an infectious organism that can mount in response to.
