Altered gut microbiota composition in children and their caregivers infected with the SARS-CoV-2 Omicron variant.

"data availability raw sequencing data have been deposited in ncbi sra database under study accession number prjna859805. data availability raw sequencing data have been deposited in ncbi sra database under study accession number prjna859805"

"Declarations Ethical approvalThis study was approved by the Ethics Review Committee of Shanghai Children’s Hospital, School of Medicine, Shanghai Jiao Tong University (2022R071-E01), and carried out in accordance with the ethical guidelines of the Helsinki Declaration (as revised in 2013). Informed consents to participate in the study have been obtained from participants (or their parent or legal guardian in the case of children under 16). Conflict of interestNo financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. Author Wen-Hao Zhou is a member of Editorial Board for World Journal of Pediatrics. The paper was handled by the other Editor and has undergone rigorous peer review process. Author Wen-Hao Zhou was not involved in the journal's review of, or decisions related to this manuscript. The authors have no conflict of interest to declare. Conflict of interest No financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. Author Wen-Hao Zhou is a member of Editorial Board for World Journal of Pediatrics. The paper was handled by the other Editor and has undergone rigorous peer review process. Author Wen-Hao Zhou was not involved in the journal's review of, or decisions related to this manuscript. The authors have no conflict of interest to declare."

"Funding This work was supported by the grants from the National Natural Science Foundation of China (No. 81870373), and the Natural Science Foundation of Shanghai (No. 22ZR1451800). The funders had no role in study design, data collection, and analysis, decision to publish, or preparation of the manuscript."