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. 2021 Jun 10;21:1105. doi: 10.1186/s12889-021-11177-x

Fig. 3.

Fig. 3

Daily SARS-CoV-2 diagnostic tests administered per 1000 population in each COVID-19 region in Illinois in 2020. Shown: 7-day moving averages. Colors indicate super-region membership of each COVID-19 region, as indicated in Fig. 1a