Spearman rank correlations between our measures of epidemic size and our measures of social mobility in New York counties at the time of PAUSE.

The epidemic measures (computed on the day PAUSE started) are: cumulative incidence for each county (CI, columns 1 and 2); percent cumulative incidence (%CI, columns 3 and 4); daily incidence (DI, columns 5 and 6); percent daily incidence (%DI, columns 7 and 8). The first row shows the correlations of these epidemic measures with the lowest traffic level (which occurred briefly after the start of PAUSE), as a fraction of the original traffic baseline. The other three rows show the corresponding correlations with the lowest mobility to Retail, Grocery and Workspace (as a fraction of the baseline). The corresponding significance values are shown as separate columns. The correlations with daily incidence DI and %DI were based on values from the window smoothed time series; the corresponding correlations based on raw time series were very similar.