The adaptive immune system is required to fight against pathogens that cannot be controlled by innate immune defences. It is also referred to as the acquired immune system because it is acquired during the course of life. They are specific to the type of pathogen invading the body.
All the components of the adaptive immune system are generally inactive however when activated these components adjust to the presence of all the infectious agents by proliferating and developing a potent mechanism for eliminating the microbes.
Two Types of adaptive responses are – humoral immunity moderated by antibodies which are developed by B lymphocytes and cell-mediated immunity, moderated by T Lymphocytes.
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