The complex and subtle immune mechanism of the human body is a strong fortress to defend the health of the individual.

Relying on many immunization corps through a tight defensive checkpoint, the interlocking mechanism protects the body from disease.

Immune cells generally refer to all cells involved in the immune response and can be classified into Innate Immune Cells (Humoral Immunity) and Adaptive Immune Cells (Cell-mediated Immunity.) Innate immune cells include macrophages, dendritic cells, natural killer cells, neutrophils, eosinophils, basophils, and mast cells. These innate immune cells are able to recognize and eliminate pathogens, killing microorganisms by contact attack or phagocytosis of larger pathogens. Adaptive immune cells include B-cells and T-cells. When the pathogen invades, these members are mobilized to fight side by side, and T-cells and B-cells produce a series of reactions against pathogens, antibodies, and immune memory. Therefore, when the same pathogen re-invades, the body's immune cells will rapidly proliferate, while producing a large number of antibodies, quickly killing the invading pathogens.