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. 2022 Oct 3;13:5801. doi: 10.1038/s41467-022-33042-0

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — The figure depicts real-time polymerase chain reaction (RT-PCR) confirmed COVID-19 cases in patients with autoimmune rheumatic disease (ARD) and controls (CG). All participants were followed from the day of inclusion, which is the day of first dose vaccination with CoronaVac vaccine (DO) up to 10 days after the second dose vaccination (T1). The second period of follow-up (T2) ranged from T1 to 6 months after the second dose. Kaplan–Meier curves were compared with long-rank test and if p-value was <0.05 then the difference was considered significant.