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. 2021 Jan 21;11:2062. doi: 10.1038/s41598-021-81629-2

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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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SARS-CoV-2 neutralizing antibody positivity during different weeks since onset of illness. SARS-CoV-2 NAbs were measured at different time points from patients with severe pneumonia (n = 10), moderate illness (n = 19), mild illness (n = 150) and prolonged shedding (n = 82) (A) and also measured at different time points irrespective of disease severity. 14 to 21 (n = 96), day 22 to 28 (n = 99), day 29 to 36 (n = 132), day 37 to 42 (n = 32), day 43 to 49 (n = 16), between ay 50 to 70 (n = 29) and more than 90 day (n = 76) (B), Responses were also measure during early illness (4 to 8 weeks, time point A) and during convalescence (> 90 days since onset of illness, time point B). The black dotted line indicates the cut-off value of a positive result.