Covid rapid test accuracy rate11/18/2023 ![]() ![]() ![]() Among 871 (79%) paired swabs from asymptomatic participants, the antigen test sensitivity was 41.2%, specificity was 98.4%, and in this population the estimated positive predictive value (PPV) was 33.3%, and negative predictive value (NPV) was 98.8%. Virus culture was attempted on all antigen-positive or real-time RT-PCR–positive specimens. During September 28–October 9, a total of 1,098 paired nasal swabs were tested using the Sofia SARS Antigen FIA and real-time RT-PCR. This investigation evaluated performance of the Sofia SARS Antigen Fluorescent Immunoassay (FIA) (Quidel Corporation) compared with real-time reverse transcription–polymerase chain reaction (RT-PCR) for SARS-CoV-2 detection among asymptomatic and symptomatic persons at two universities in Wisconsin. However, test performance data from symptomatic and asymptomatic persons are limited. colleges and universities and other congregate settings (e.g., nursing homes and correctional and detention facilities), where serial testing of asymptomatic persons might facilitate early case identification ( 3– 5). ![]() Antigen tests have received Food and Drug Administration (FDA) Emergency Use Authorization (EUA) for use in asymptomatic and symptomatic persons within the first 5–12 days after symptom onset ( 2). Kirking, MD 1 Ryan Westergaard, MD, PhD 3 ,4 Marie Killerby, VetMB 1 CDC COVID-19 Surge Laboratory Group ( View author affiliations) View suggested citationĪntigen-based tests for SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19), are inexpensive and can return results within 15 minutes ( 1). Thornburg, PhD 1 Kimberly Goffard, MBA 10 Brandi Limbago, PhD 1 Allen Bateman, PhD 7 ,11 Jacqueline E. Harcourt, PhD 1 Krista Queen, PhD 1 Jing Zhang, PhD 1 Brett Whitaker, PhD 1 Hannah Browne 1 Magdalena Medrzycki, PhD 1 Patricia Shewmaker, PhD 1 Jennifer Folster, PhD 1 Bettina Bankamp, PhD 1 Michael D. Delahoy, PhD 1 ,2 Dustin Currie, PhD 1 ,2 Blake Cherney, MS 1 Marie Kirby, PhD 1 Geroncio Fajardo, MD 1 Motria Caudill, PhD 1 ,6 Kimberly Langolf, MS 7 Juliana Kahrs, MS 7 Patrick Kelly, MD 4 ,8 Collin Pitts, MD 4 ,8 Ailam Lim, PhD 9 Nicole Aulik, PhD 9 Azaibi Tamin, PhD 1 Jennifer L. Abedi, MPH 1 Dena Bushman, MSN, MPH 1 ,2 Miranda J. Pray, PhD 1 ,2 ,3,* Laura Ford, PhD 1 ,2,* Devlin Cole, MD 3 ,4 Christine Lee, PhD 1 ,5 John Paul Bigouette, PhD 1 ,2 Glen R. Please note: This report has been corrected. ![]()
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