Before revision:  This result is explained in terms of the stochastic sampling occurring during the case-by-case manual reconstruction of contacts of infected individuals , contrasted with the intrinsically prearranged nature of digital tracing, determined by the decision to adopt the app or not of each individual.
After revision:  This result is explained in terms of the stochastic sampling occurring during the case-by-case manual reconstruction of contacts , contrasted with the intrinsically prearranged nature of digital tracing, determined by the decision to adopt the app or not of each individual.