Study shows deeper COVID impact in socially vulnerable neighborhoodsAn analysis of neighborhood-level data in three US cities highlights the racial and socioeconomic disparities in COVID-19 positivity, incidence, and mortality, researchers reported today in the Annals of Internal Medicine.For the study, researchers from Drexel University's Dornsife School of Public Health used data on the total numbers of tests, confirmed cases, and deaths by ZIP code tabulation area (ZCTA) of residence from Chicago, New York, and Philadelphia from the beginning of the pandemic through early October 2020.They calculated testing rates, positivity ratio, confirmed case rates, and mortality rates per ZCTA, then compared those rates with data from the Centers