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. 2020 Sep 5;14(3):351–363. doi: 10.1007/s11869-020-00940-5

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© Springer Nature B.V. 2020

This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.

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Fig. 6 — Linear regression analysis of regional COVID-19 cases and daily air pollutants’ concentrations in Bangladesh: number of COVID-19 cases per 100,000 people vs. daily mean levels of NO₂ (a), SO₂ (b), CO (c), and O₃ (d)