The IVSS management portal was designed and developed at the request of Shahroud University of Medical Sciences and in collaboration with the World Health Organization (WHO). The purpose of this system was to monitor and analyze COVID-19 vaccination cohort data at the county level in Shahroud. It enabled the live and online presentation of statistical and analytical reports and charts. The portal was built using R Shiny and was fully responsive, making it accessible on all devices, including desktops and tablets. Data is received live and online, and the charts and analyses are updated in real time based on the latest information.

Key Features and Capabilities of the Portal:

• Real-time Monitoring: Displays the number of vaccinated users and their reported side effects online
• Advanced Statistical Analysis: Includes Cox regression analysis and other models for tracking the occurrence of side effects
• User Management: Access control, data visibility settings, and user role management
• High-Volume Data Processing: Designed to handle full-scale cohort data for the entire county
• Live Analytical and Statistical Charts: Interactive visualizations with detailed data exploration capabilities