Fig. 4From: Geographic and demographic heterogeneity of SARS-CoV-2 diagnostic testing in Illinois, USA, March to December 2020a County-level average daily SARS-CoV-2 diagnostic tests per 1000 population for a representative week ending October 26, 2020. Champaign County, in COVID-19 Region 6, stands out with the highest per capita testing rate in the state. Central and Southern counties have the lowest rates. b County-level average daily positive tests per 1000 population for the week ending October 26, 2020Back to article page