Fig. 4: Contacts in CNS data set: signal strength, exposure, and inter-contact time.
From: Digital proximity tracing on empirical contact networks for pandemic control
(a): A scatterplot of signal strength vs. duration for all contact events in the CNS data set, displaying the thresholds defining the various policies (Tp for signal strength and Td for the duration): the contacts identified as "at risk'' are those situated above and to the right of the dashed colored lines. (b) and (c) separately depict the distributions of signal strength and duration, together with the infectiousness functions ωdist and \({\omega }_{\mathrm{exposure}\,}\), respectively (black curves), see Supplementary Note 1.2 for their analytical form. (d): The distribution of time elapsed between the infection of an individual and their successive contacts, obtained with εI = 0.8 and for Policy 5 in the CNS data set. The black curve shows the normalized infectiousness ω(τ) as a function of time, and the purple dashed line is the cumulative probability s(τ) to identify an infected individual.
