Fig. 2: The technological efficacy of Smittestopp.
From: Nationwide rollout reveals efficacy of epidemic control through digital contact tracing
a The probabilities of detection between different pairs of architectures as it developed over a period of 18 days, b The detection of contacts varies between 93% with only Android phones in the population to 79% with only iOS phones in the population. The detection rate is 80% when we have an equal split, c The efficacy of tracing as a function of app uptake in the two user groups. The lines mark efficacies of 25%, 50%, and 75%, respectively, d Tracing efficacy as a function of app uptake, assuming the same uptake in the two groups as well as an equal market share \({\phi }=0.5\).
