CovidCounties is an interactive real time tracker of the COVID19 pandemic at the level of US counties

Management of the COVID-19 pandemic has proven to be a significant challenge to policy makers. This is in large part due to uneven reporting and the absence of open-access visualization tools to present and analyze local trends as well as infer healthcare needs. Here we report the development of CovidCounties.org, an interactive web application that depicts daily disease trends at the level of US counties using time series plots and maps. This application is accompanied by a manually curated dataset that catalogs all major public policy actions made at the state-level, as well as technical validation of the primary data. Finally, the underlying code for the site is also provided as open source, enabling others to validate and learn from this work.Â

新冠疫情（COVID-19）的防控管理已被证明是政策制定者面临的一项重大挑战。这在很大程度上源于各地报告数据参差不齐，且缺乏用于呈现、分析本地疫情趋势并推演医疗需求的开放获取可视化工具。在此，我们介绍CovidCounties.org的开发情况：这是一款交互式网页应用，可通过时序图与地图呈现美国县级层面的每日疫情趋势。该应用配套了经人工整理的数据集，收录了美国各州层面出台的所有重大公共政策举措，并对原始数据开展了技术验证。最后，该平台的底层代码也以开源形式发布，便于其他研究者验证该研究成果并从中学习。