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. 2023 Jun 28;13(6):e061643. doi: 10.1136/bmjopen-2022-061643

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© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Comparison of the Kaplan-Meier survival curve of adverse events following immunisation (AEFI) duration between first and second doses of COVISHIELD vaccination. Kaplan-Meier curves show the duration of AEFI after the onset. The estimated median duration of AEFI was 76 hours (95% CI 70.8 to 81.1) (approximately 3 days). There was no difference in duration between the first and second doses.