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. 2022 Jan 11;42(2):130–135. doi: 10.1097/INF.0000000000003779

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This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with 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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FIGURE 3. — Comparison of the relationship between nucleocapsid and spike antigenemia. (A) Detectable nucleocapsid levels in samples without and with concurrent spike antigenemia demonstrates overall higher levels of nucleocapsid when spike is also present. (B) Isolated spike antigenemia was rare. (C) There does not appear to be a correlation between spike and nucleocapsid levels in specimens with both proteins concurrently as indicated by a low R² of 0.04 by linear regression of the log-transformed antigen levels.