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. 2021 May 28;12:653045. doi: 10.3389/fphys.2021.653045

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Copyright © 2021 Kaur, Yogeswaran, Muthumalage and Rahman.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Serum Angiotensin 1–7 levels increase amongst patients with a history of COVID-19. Blood serum samples from healthy (CoV–), COVID-19 positive (CoV+), and COVID-19 recovered (CoV Rec) subjects were obtained, and Angiotensin 1–7 (Ang1–7) levels were quantitatively measured. The obtained results were plotted based on serum levels in (A) CoV-, CoV+, and CoV Rec subjects and (B) CoV- and COVID-19 (positive and recovered) patients with and without a smoking history. Data are shown as mean ± SEM. ^∗p < 0.05, ^∗∗p < 0.01, and ^∗∗∗p < 0.001 as per One-Way ANOVA for multiple comparisons. NS, Non-Smokers and Sm: Smokers.