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. 2021 Dec 17;9(12):1931. doi: 10.3390/biomedicines9121931

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© 2021 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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Circulating TGF-β levels were higher in severe post-COVID-19 patients with lung fibrosis events. (A) Plasma levels of TGF-β were measured in healthy, vaccinated (VAX) subjects (black and green dots, respectively), and post-COVID-19 (PC) patients (red dots), according to the grade of the pathology (moderate vs. severe, pink and blue dots, respectively). (B) TGF-β levels were evaluated according to the establishment of lung fibrosis symptoms (moderate or severe PC patients with or without fibrosis, pink or blue dots and purple and bright blue dots, respectively). Data are expressed as median. Statistical analysis was performed according to the Mann–Whitney U test.