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. 2022 Aug 16;8:362. doi: 10.1038/s41420-022-01158-3

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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. 3 — A The standard curve of fluorescence intensity of BCECF and intracellular pH value by flow cytometry. B pH values of A549 cells in Control and SARS-CoV-2 group. ^***P < 0.001, compared with Control. n = 6, one-way ANOVA followed by Bonferroni’s test was used to analyze the difference of the means. C Fluorescent intensity of BCECF. D Lyso-Tracker Red DND-99 staining. E Mean Lyso-Tracker Red DND-99 fluorescence intensity per punctum in A549 cells. n = 5, Mann–Whitney U test was used to analyze the difference of the means for significance.