The lack of a central county database of patient hepatitis B statuses in the Bay Area results in an inefficient allocation of resources in the fight against hepatitis B. This project will address that issue by utilizing existing databases of non-sensitive patient data to create dynamic maps of hepatitis B prevalence and at-risk populations in the Bay Area. The mapping project will combine Geographic Information System (GIS) technology with an easy-to-navigate interface, allowing users to visualize the areas of greatest need for preventative and disease management services. The project aims to ultimately consolidate all sources of hepatitis B patient data to help public health officials and community organizations target at-risk and affected populations in a more efficient and cost-effective manner.