Immunology tests, a cornerstone in modern diagnostics, employ a sophisticated approach by utilizing antigens and antibodies to identify the presence of pathogens within biological specimens. These tests play a pivotal role in disease detection, offering invaluable insights into the body's immune response against various infections. By utilizing specific antigens, immunology tests can pinpoint the existence of corresponding antibodies produced by the immune system to combat pathogens. Conversely, they can also detect antigens of pathogens through specific antibodies, providing a comprehensive view of the body's immune interactions. This intricate process enables the identification of diseases such as HIV 1&2, Hepatitis, and H. Pylori, both in blood and stool samples. The precise and targeted nature of these tests ensures accurate diagnoses, allowing medical professionals to initiate timely treatments and manage diseases effectively.