After a year since the hackathon, I discovered that limited public APIs prevented thorough analysis of critical factors such as healthcare capacity and resource distribution. This realization prompted me to develop a new research project. Implementing a new dataset, the analysis proved regional healthcare inequality in South Korea’s capital-centric system. My teammates and I assessed the effectiveness of policies, such as pandemic screening facilities and hospital bed capacity. Additionally, I created a policy visualization across over time and visualized mass infection data for Seoul, linking with related news articles to combat misinformation. I also suggested detailed state-level policies. Our efforts improved data visualization accessibility for the general public and developed recommendations for enhancing public health data infrastructure. I presented the work on International Open Data Day 2021 in Seoul, supported by Open Knowledge International NPO and the Korean Ministry of the Interior and Safety. It was meaningful to directly provide suggestions and contribute to public health data for the government. The projects were donated to the National Public Library of Korea as the first non-governmental archive.