"Health Sentinel” is a digital platform designed to modernize and streamline the reporting and monitoring of notifiable diseases in Sri Lanka, mitigating the inefficiencies and delays in the current manual reporting system. “Health Sentinel” enables healthcare professionals to report cases in real-time, monitor diseases and take timely actions to prevent the spread of diseases. With this system in place, reporting of cases will be instant, unlike the current process, which can take up to two weeks and in some instances, cases do not get reported at all. The system accommodates all key stakeholders in the process: doctors, hospitals, medical officers of health (MOH), public health inspectors (PHI) and the epidemiology unit allowing each of them to perform their respective responsibilities through a centralized and role-based platform. Features like real time notifications, interactive dashboards and map-based visualization enhance the operational efficiency. The system also accommodates the public and enables them to view the confirmed cases and public-related events hosted in their area. This streamlined workflow not only improves the speed and accuracy of notifiable disease reporting but also strengths early detection, response coordination and public health decision making across the country.