Flow cytometry is a cutting-edge technology that plays a crucial role in disease diagnosis by analyzing the physical and chemical properties of cells and particles. This technique enables rapid, precise identification of cell populations, making it indispensable for diagnosing blood disorders, cancers, and immune system diseases. By measuring markers on the cell surface and within cells, flow cytometry provides detailed insights into disease mechanisms, aiding in early detection and personalized treatment planning. Its ability to analyze thousands of cells per second ensures accurate and efficient results, making it a cornerstone of modern diagnostic and research laboratories.