Before revision:  Here, we demonstrate that, in addition to alarming and informing, mobile tracing can detect nearly all individuals that are infected by SARS-CoV-2 , including the notorious asymptomatic infections. Besides voluntary reports of the infectious health status, our algorithm requires the location information of an overwhelming part of the population and then guarantees that almost all SARS-CoV-2 infections in that closed population can be detected.
After revision:  Here, we demonstrate that, in addition to alarming and informing, mobile tracing can detect nearly all individuals that are infected by SARS-CoV-2 . Our algorithm BETIS (Bayesian Estimation for Tracing Infection States) makes use of self-reports of the user's health status. Then, BETIS guarantees that almost all SARS-CoV-2 infections in that closed population can be detected.