Fig. 3: Comparison of the ___location of identical sequences with expectations from mobility data reveals spread between WA male prison postcodes.

a, Relationship between the RR of observing identical sequences in two counties and the RR of movement between these counties as obtained from mobile phone mobility data. The trend line corresponds to the predicted RR of observing identical sequences in two regions from a GAM. The R² indicates the variance explained by the GAM. b, Scaled Pearson residuals of the GAM plotted in a as a function of the number of pairs of identical sequences observed in pairs of counties. c, Map of male state prisons in WA. Mason, Walla Walla and Franklin male prisons are coloured. d, RR of observing identical sequence between Mason and Franklin County’s postcodes. e, RR of observing identical sequence between Mason and Walla Walla County’s postcodes. f, Centrality score (eigenvector centrality) for each postcode that is the home of a male state prison. g, Week of sequence collection within eight large clusters of identical sequences identified in postcodes with WA male state prisons. In g, the top coloured segments indicate the period during which each cluster was identified. For c, maps were generated using shapefiles from the US Census Bureau⁴⁴.