This lecture introduces the field of immunoengineering, focusing on the basics of the immune system, the role of different immune cells, and the process of antibody production. The instructor and guest lecturers provide insights into the course structure, recommended textbooks, and assessment methods. Topics covered include the differentiation between B and T cells, immune cell maturation, antibody specificity, and immune responses to pathogens. The lecture also discusses the immune system's defense mechanisms, vaccination, and autoimmune diseases.