Spatial Spread of 2019 novel coronavirus in China

Gravity Model


Black lines represent the link weights in the 90th percentile and are drawn between prefecture centroids. Link weight magnitude was estimated from the best-fit model, which includes effects of distance, population size and whether links cross quarantine borders. The map is fully connected and invisible links represent the remaining 90% of links. Administrative units used to fit the model are colored by the first date of infection. Uninfected prefectures are colored grey.

Supplemental Information