A summary of the Spearman’s Rank-Order correlation (<i>r</i>_<i>s</i>) between variables.

Only variables for which there was a correlation with another variable of absolute value greater than 0.5 appear in this figure. (A) Correlations when including all counties, as is the case with virus introduction analyses. (B) Correlations when including only counties that have been seeded in period 1 or 2, as is the case with period 2 spreading analyses. (C) Correlations when excluding only counties that were not seeded at any point in the year, as is the case with period 3 spreading analyses. (D) Correlations when including only counties with available period 3 mask usage data. (EPS)