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. 2021 Dec 16;12:7215. doi: 10.1038/s41467-021-27484-1

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Fig. 1 — County-level, year 2016 (a) cardiovascular and respiratory disease age-adjusted death rates (per 100,000 in population) are from CDC and (b) PM_2.5 secondary organic aerosol concentrations are predicted by CMAQ. White in (a) indicates no death rate data while light gray indicates low reported rates.