The type of cells involved in immune response are known as lymphocytes, which include B cells and T cells. B cells produce antibodies that target pathogens, while T cells are responsible for directly attacking infected cells or orchestrating the immune response. These cells play crucial roles in defending the body against infections and diseases, enabling specific and adaptive responses to various threats. The collaboration between different types of lymphocytes enhances the body’s ability to recognize and remember pathogens, forming the basis of acquired immunity and vaccination.