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. 2021 Jan 20;753:142272. doi: 10.1016/j.scitotenv.2020.142272

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© 2020 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Fig. 1 — The spatial distribution of temperature and R₀ of COVID-19 in the 202 districts.

Panel a exhibited the geographic distribution of basic reproductive number of the 202 districts in the North America, Europe, Oceania, and Asia. The R₀ values exhibited in the map are the R₀ values of 18 days calculated for each administrative region. Panel b showed the geographic distribution of the 202 districts in the North America, Europe, Oceania, and Asia that had available data on temperature which is included in the analysis. The temperature data are shown as the mean value. Panel c showed the geographic distribution of the 134 districts in the North America, Europe, Oceania, and Asia that had available data on UV radiation data.