Fig. 6
The infection risk of susceptible individuals in the original supermarket scenario, and when implementing different NPIs: (I) improving ventilation from \(\textrm{ACH}=0.12\ \mathrm {h^{-1}}\) to \(\textrm{ACH}=3\ \mathrm {h^{-1}}\), (II) all wearing a surgical mask (\(\eta =60\%\)), (III) halving the number of people entering, (IV) reducing the duration of shopping for each customer by 50% (\(T=30 \textrm{s}\)), (V) opening another two checkouts. The dots represent infection risk of each susceptible individual leaving the supermarket. For each intervention, a logistic curve is fitted to the infection risk data.
