The body’s defense mechanism against infections and harmful intruders is known as the immune system. Its role is crucial in preventing frequent illnesses caused by bacteria or viruses. Comprising specialized cells, tissues, and organs, the immune system functions cohesively to safeguard the body. A compromised immune system is more susceptible to regular infections. Components such as white blood cells, antibodies, organs, and lymph nodes collectively constitute the body’s immune system. Various tests are conducted to identify diseases, specifically focusing on detecting immunoglobulins or antibodies present in the body.