Fig. 2
From: Analyzing inherent biases in SARS-CoV-2 PCR and serological epidemiologic metrics
Effect of the prolonged PCR positivity on the observed SARS-CoV-2 positivity rate. Ratio of the proportion of tests that are PCR positive (“positivity rate”) in presence of the prolonged PCR positivity over the proportion of tests that are PCR positive assuming no prolonged PCR positivity. The prolonged PCR positivity is assumed to last on average for 2, 3, 4, and 6 weeks. In this epidemic simulation, R0 has a value of 1.6, that is an epidemic time course in presence of social and physical distancing interventions. The simulation for R0 of 3.0, that is for the natural course of the epidemic in absence of any social or physical distancing interventions, is found in Figure S2