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. 2020 Dec 9;8(1):ofaa582. doi: 10.1093/ofid/ofaa582

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© The Author(s) 2020. Published by Oxford University Press on behalf of Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 3. — Heat map of Chicago neighborhoods and surrounding counties by seropositive rate for NM HCW and Chicagoland COVID-19 case rate data. Range of % positive IgG across neighborhoods is on the left. COVID-19 case rates from the Illinois Department of Public Health as of June 15, 2020, is on the right. Darker colors represent higher IgG/case % rates, and lighter represent lower IgG/case + rates. Abbreviations: COVID-19, coronavirus disease 2019; IgG, immunoglobulin G; NM HCW, Northwestern Medicine health care worker.