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. 2021 Mar 11;11:5804. doi: 10.1038/s41598-021-83930-6

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© The Author(s) 2021

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Quantification of particle number, size, and intensity in lyophilized SARS-CoV-2. (A) Plot showing intensity versus the size of the particles in SK-01 V1 (inactivated virus & GM-CSF). (B) Plot showing means of particle size of SK-01 V1 in the sample read three times concerning the concentration. (C) Graph illustrating zeta analysis of inactivated virus particles in OZG-3861 V1 concerning intensity. (D) Bar graphs showing quantified size and intensity of the sample.