English: Antigens present in the body are consumed by macrophages. The macrophages break down these antigens and present the shape on their surface. T-cells attach to these presented antigens, and send the signal to the T-helper cell to create B-cells and Killer T cells that correspond with the antigen shape. Killer T cells get rid of any cells in the body that are already infected, while B cells produce Memory B cells, Effector B cells, and antibodies. Memory B cells produce antibodies that stay present on their surface to fight the antigens if they ever return, while Effector B cells produce antibodies that do not stay on their surface.