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. 2022 Mar 28;14(7):1407. doi: 10.3390/nu14071407

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Free zinc in relation to total zinc and biomarkers of selenium and copper status in sera from COVID-19 patients. COVID-19 serum samples are separated and color-coded into patients that had died from COVID-19 (red, denoted as “Death”), and those who had survived (black symbols, “Discharge”). Free serum zinc concentrations were compared to (A) total zinc in COVID-19 patients, (B) total zinc in control subjects (CTR), (C) total Se in patients, (D) serum SELENOP in patients, (E) total serum copper concentrations, and (F) serum ceruloplasmin concentrations. Spearman correlation coefficients (r) and p values are indicated.