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. 2023 Dec 14;11:1269194. doi: 10.3389/fpubh.2023.1269194

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Copyright © 2023 Ye, Li, Zhao, Wu, Qu, Guo, Abudunaibi, Chen, Cai, Chen, Lin, Xie, Zhan, Ou, Deng, Chen and Zheng.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The estimated effectiveness of inactivated COVID-19 vaccines against symptomatic SARS-CoV-2 infections caused by Omicron BA.2. Unadjusted (A) and adjusted (B) logistic conditional model by age group (3–17 years, 18–64 years and older than 65 years) and gender (male and female) to estimated vaccine effectiveness by various intervals.