Introduction

The ability of pathogens to establish a successful infection is mediated by both intrinsic properties of the pathogen itself and the ability of the host to respond to the invading organism. The immune system is responsible for responding to and protecting against infectious agents and comprises innate and adaptive components. The innate immune system represents the first line of defense in the host response to infection. Unlike the adaptive (acquired) immune response, which requires several days to generate effector lymphocytes in the numbers necessary to mount an effective immune response, the innate immune system is poised to immediately recognize and respond to the earliest stages of infection. Whereas the adaptive immune system of an organism acquires over time the ability to readily respond to highly specific antigens found on previously encountered pathogens, the innate immune system is able to respond to pathogens that have not been previously or repeatedly encountered. Thus, differences in the time needed to respond to a pathogen, the requirement for host memory, and the effector cells and molecules involved in the response all distinguish innate immunity from that of adaptive immunity.

How To Bolster Your Immune System

How To Bolster Your Immune System

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