Comparative analyses of eighteen rapid antigen tests and RT-PCR for COVID-19 quarantine and surveillance-based isolation

Author:

Wells Chad R.ORCID,Pandey AbhishekORCID,Moghadas Seyed M.ORCID,Singer Burton H.,Krieger Gary,Heron Richard J. L.,Turner David E.,Abshire Justin P.,Phillips Kimberly M.ORCID,Michael Donoghue A.ORCID,Galvani Alison P.ORCID,Townsend Jeffrey P.ORCID

Abstract

Abstract Background Rapid antigen (RA) tests are being increasingly employed to detect SARS-CoV-2 infections in quarantine and surveillance. Prior research has focused on RT-PCR testing, a single RA test, or generic diagnostic characteristics of RA tests in assessing testing strategies. Methods We have conducted a comparative analysis of the post-quarantine transmission, the effective reproduction number during serial testing, and the false-positive rates for 18 RA tests with emergency use authorization from The United States Food and Drug Administration and an RT-PCR test. To quantify the extent of transmission, we developed an analytical mathematical framework informed by COVID-19 infectiousness, test specificity, and temporal diagnostic sensitivity data. Results We demonstrate that the relative effectiveness of RA tests and RT-PCR testing in reducing post-quarantine transmission depends on the quarantine duration and the turnaround time of testing results. For quarantines of two days or shorter, conducting a RA test on exit from quarantine reduces onward transmission more than a single RT-PCR test (with a 24-h delay) conducted upon exit. Applied to a complementary approach of performing serial testing at a specified frequency paired with isolation of positives, we have shown that RA tests outperform RT-PCR with a 24-h delay. The results from our modeling framework are consistent with quarantine and serial testing data collected from a remote industry setting. Conclusions These RA test-specific results are an important component of the tool set for policy decision-making, and demonstrate that judicious selection of an appropriate RA test can supply a viable alternative to RT-PCR in efforts to control the spread of disease.

Funder

Gouvernement du Canada | Canadian Institutes of Health Research

Natural Sciences and Engineering Research Council of Canada: Emerging Infectious Disease Modelling, MfPH grant

BHP and BP

Notsew Orm Sands Foundation BP and BHP

Publisher

Springer Science and Business Media LLC

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