When did the first COVID-19 case arise? (IMAGE)
Caption
Image presents global COVID-19 spread across countries over time. Countries marked in yellow--upper bound of a 95% confidence interval of the estimated origin date includes particular date (i.e., probability of the country already experiencing first case is above 5%); countries marked in orange--estimated origin date already occurred by that date (i.e. origin dating indicates that the COVID-19 is already spreading in the country); countries marked in red--first reported case already occurred by that date; countries marked in grey--insufficient data for origin dating. Map layers were created using the R package rworldmap, Version 1.3-6 (http://cran.r-project.org/web/packages/rworldmap).
Credit
Roberts DL et al., 2021, PLOS Pathogens
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CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
License
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