The study of the immune system, its components, biological processes, physiological functioning, kinds, disorders, and much more are all covered under the field of biology known as immunology. By defending our body's cells, tissues, and organs from invasive infections through a variety of lines of defense, the immune system serves as the body's defense system. In general, the immune system fights off disease-causing bacteria and other foreign antigens by recognizing and eliminating them. Our immune system can become weakened or stop working under certain circumstances, which can cause numerous infectious diseases like the flu and fever as well as deadly ailments like cancer and AIDS. The immune system is made up of various cells and organ types that defend our bodies from infections. Microorganisms including bacteria, fungi, viruses, and protozoans that cause illnesses in the body are referred to as pathogens. Antigens are substances that cause the production of antibodies. They could be any organism that isn't naturally present in human bodies, including parasites, fungi, bacteria, viruses, and haptens. All of the immune system's molecules and cells are spread throughout the body's tissues and lymphoid organs, where they fight off infectious diseases caused by microbes, slow the growth of tumours, and begin the process of healing damaged tissues. Microbiology Conference 2023 elaborated the information related to immunology