In this article we will discuss about the meaning and components of innate immunity. Meaning of Innate Immunity: Protection against infection that relies on mechanisms which are existing before the infection, are referred to as innate immunity. It is also called natural or native immunity. This type of immunity is non-specific, i.e., not specific to a particular pathogen, similar kind [...]
Protective immunity against a microbe may be induced by the host's response to the microbe or by the transfer of antibodies or lymphocytes specific for the microbe. Such form of adaptive immunity that is induced, by exposure to a foreign antigen is called active immunity (Fig. 6.44), because the immunized individual plays an active role in responding to the antigen. [...]
Innate and adaptive immunity do not operate independent of each other. They act in cooperative and interdependent ways that make both of them more effective. The activation of innate immune responses provides signals that function in concert with antigen to stimulate the proliferation and differentiation of antigen-specific T and B lymphocytes (Fig. 6.38). In addition, the adaptive immune system generates [...]