RT Book, Section A1 Chandrasoma, Parakrama A1 Taylor, Clive R. SR Print(0) ID 183448 T1 Chapter 4. The Immune Response T2 Concise Pathology, 3e YR 1998 FD 1998 PB The McGraw-Hill Companies PP New York, NY SN 9780838514993 LK accessphysiotherapy.mhmedical.com/content.aspx?aid=183448 RD 2024/04/16 AB The immune response is a complex series of cellular interactions activated by the entry into the body of foreign (nonself) antigenic materials such as infectious agents and a variety of macromolecules. After processing by macrophages, the antigen is presented to lymphocytes, which are the major effector cells of the immune system (Figure 4-1). Lymphocyte activation by antigen results in proliferation and transformation of the lymphocytes, which lead to two main types of immune response: