Social Vulnerability Index 2018 - United States, tract

ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created Centers for Disease Control and Prevention Social Vulnerability Index (CDC SVI or simply SVI, hereafter) to help public health officials and emergency response planners identify and map the communities that will most likely need support before, during, and after a hazardous event.

SVI indicates the relative vulnerability of every U.S. Census tract. Census tracts are subdivisions of counties for which the Census collects statistical data. SVI ranks the tracts on 15 social factors, including unemployment, minority status, and disability, and further groups them into four related themes. Thus, each tract receives a
ranking for each Census variable and for each of the four themes, as well as an overall ranking.

In addition to tract-level rankings, SVI 2018 also has corresponding rankings at the
county level. Notes below that describe “tract” methods also refer to county methods.

美国疾病控制与预防中心地理空间研究、分析与服务计划（GRASP）创建了疾病控制与预防中心社会脆弱性指数（CDC SVI，以下简称SVI），旨在协助公共卫生官员和应急响应规划者识别并绘制最有可能在危险事件之前、期间和之后需要支持的社会群体。SVI揭示了每个美国人口普查区域的相对脆弱性。人口普查区域是县级行政单位的细分，人口普查局针对这些区域收集统计数据。SVI根据15个社会因素（包括失业率、少数族裔身份和残疾状况）对区域进行排名，并将它们分为四个相关主题。因此，每个区域都会针对每个普查变量和四个主题分别获得一个排名，以及一个综合排名。此外，SVI 2018还提供了县级行政单位的相应排名。以下关于“区域”方法的注释同样适用于“县”方法。