Strategy for a Risk-stratified Use of Rapid Antigen Testing: Containing the SARS-CoV-2 Pandemic by Integrating Rapid Testing into Case and Contact Tracing Management

Abstract

The use of rapid testing offers an opportunity to contain the SARS-CoV-2 pandemic; however, the impact of false-positive and false-negative test results and population response must be anticipated and taken into consideration to avoid or mitigate harm. Untargeted use of rapid testing is associated with high direct and indirect costs and will have limited impact on the pandemic if resources are used inefficiently. We suggest using a risk-stratified testing strategy, based on targeted testing directly integrated with the Public Health Service's case and contact tracing management. According to the proposed targeted testing strategy stratified by risk of infection, all persons with acute symptoms of a respiratory infection as well as other population groups with an elevated probability of being infected with SARS-CoV-2 infection should be specifically tested to identify "hidden" infection networks. The strategy should include a uniform communication strategy for dealing with positive and negative test results, a targeted expansion of access to low-threshold testing opportunities, ensuring timely and free access to the results of confirmatory tests, and integration into an overarching documentation system for evaluation. This integration of a risk-stratified targeted testing strategy into case and contact tracing management embedded in a comprehensive strategy can help to reduce infection rates in a resource-efficient and sustainable manner.