Figure 5

Spread and containment of SARS-CoV-2 using tracing and quarantine interventions in a Monte Carlo simulation including 1st and 2nd order tracing. The downward arrow indicates the time axis. Shown is a small sub-tree of the full infection tree. This sub-tree starts with simulated person P936, who was exposed on day 147, and includes the infection chains for the first three generations of infectees. The input settings for the simulation were: \({R_{0}}= 2.0\), \({\Delta T _{\mathrm {trace}}}= 7\) days, \({ p_{\mathrm {app}}}= 0.6\), \({\eta _{\mathrm {DCT}}}= 0.9\), \({\alpha }= 0.6\). Each box represents a person. The leftmost column in each box gives the person ID and whether or not they use the DCT app. The middle column indicates the days when the person was exposed, became infectious, and recovered. The rightmost column indicates if and when the person was traced, reported, and quarantined