United States COVID-19 County Policy Database, 2020-2021

The objective of the U.S. COVID-19 County Policy (UCCP) Database was to systematically gather, characterize, and assess geographic and longitudinal variation in U.S. COVID-19-related policies at the county and state levels. The research team gathered policy data on a weekly basis for 309 counties in 50 states and Washington D.C. Although these counties were not nationally representative, they included over half of the U.S. population and were diverse with respect to geography, the race/ethnicity of residents, and political climate. Weekly data were collected between January 2020 and December 2021 on a wide range of COVID-19-related policies that were in effect, providing a longitudinal picture of county policies during that period.

美国COVID-19县级政策（U.S. COVID-19 County Policy, UCCP）数据库的核心目标，是系统收集、刻画并评估美国县级与州级层面COVID-19相关政策的地理分布差异与纵向变迁特征。本研究团队针对美国50个州及华盛顿哥伦比亚特区的309个县按周采集政策数据。尽管该样本并非全国代表性样本，但覆盖了美国过半总人口，且在地理环境、居民种族/族裔构成与政治氛围等维度均具有多样性。研究团队于2020年1月至2021年12月期间，按周采集彼时生效的各类COVID-19相关政策数据，完整呈现了该时段内县级防疫政策的纵向演变全貌。