Figure 2. GPS-estimated visitor catchment distributions for actual and hypothetical alternative study sites.

GPS-estimated visitor catchment distributions for (A) the actual study location $V_{\text{j}}^{\text{site}}$ or (B) a hypothetical alternative study site in Somerville Ward 1 $V_{\text{j}}^{\text{alt}}$. Correlations between $V_{\text{j}}^{\text{site}}$, $V_{\text{j}}^{\text{alt}}$, and the cumulative incidence of PCR-confirmed SARS-CoV-2 infection ${\theta }_j^{PCR}$ are shown in (C) and (D).