Innate immunity
Innate immunity refers to the natural, non-specific defense mechanisms that organisms have against pathogens, providing immediate protection without prior exposure to the invading agent. This type of immunity is mediated by Protein complexes and Cell signaling pathways that recognize Pathogens and trigger a response to eliminate them. The innate immune system includes physical barriers, such as the skin and mucous membranes, as well as cellular components like Neutrophils and Macrophages. It also involves the production of Antibody-like molecules and the activation of Complement system pathways. Innate immunity works in conjunction with the Adaptive immune system to provide comprehensive protection against infections. The study of innate immunity has led to a greater understanding of the complex interactions between Host and Pathogens, and has implications for the development of Vaccines and Immunotherapy.