Fig. 1.

Choropleth showing the number of days since the emergence of the first cases in China on the 31st of December 2019, until the cumulative number of deaths in each country surpassed 10. Countries with darker colours passed the threshold earlier than the lighter coloured countries. After starting in China, epidemics occurred in Europe, the Middle East and North America before moving south to South America, Africa and the Pacific. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)