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. 2021 Aug 20:1–4. doi: 10.1017/ice.2021.370

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© The Society for Healthcare Epidemiology of America 2021

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means subject to acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Fig. 2. — SARS-CoV-2 antigen, RT-PCR, and virus culture results from 12 nursing home residents participating in a longitudinal evaluation to characterize Abbott BinaxNOW COVID-19 Ag Cards. Specimens collected on days −15 through −1 were tested by the facility. Day 0 is the day participants first tested positive during a point-prevalence survey (PPS) conducted by the CDC. Specimens collected on days 1–9 were for the longitudinal evaluation. Cycle threshold (Ct) values were rounded to the nearest whole value; specimens with Ct values <40 were considered positive.