The Widal Test is a widely used serological test that helps detect typhoid fever, a potentially serious illness caused by the bacteria Salmonella typhi and Salmonella paratyphi. This test plays a crucial role in diagnosing typhoid, especially in regions where the disease is endemic and access to advanced diagnostics may be limited. By identifying specific antibodies—O (somatic) and H (flagellar) agglutinins—in the patient’s blood, the Widal Test can confirm whether a person has been recently infected or is in the active stage of typhoid fever. The presence of these antibodies indicates an immune response to the infection, guiding healthcare providers to start appropriate and timely treatment. Symptoms of typhoid, such as prolonged fever, weakness, abdominal pain, and diarrhea, often mimic those of other infections, making this test essential in pinpointing the correct diagnosis. While not a standalone diagnostic tool, the Widal Test is an important part of a clinical evaluation that includes patient history and physical examination. Early detection through this test can lead to faster recovery and helps prevent complications like intestinal perforation or long-term carrier states. Its simplicity, affordability, and accessibility make the Widal Test especially valuable in primary care and rural settings, reinforcing its significance in the early detection and management of typhoid fever.