Analysis of clinical characteristics of 66 pediatric patients with B.1.617.2 (Delta) variant of COVID-19.

"Declarations Ethical approvalThis work was reviewed and approved by the Medical Ethical Committee of Second Hospital of Nanjing (approval number: 2020-LS-ky003). Written informed consent was obtained from each enrolled patient. Conflict of interestAuthor GXH is a member of the Editorial Board for the World Journal of Pediatrics. The paper was handled by the other Editor and has undergone a rigorous peer-review process. Author GXH was not involved in the journal's review of, or decisions related to, this manuscript. The authors have no conflicts of interest to disclose. Conflict of interest Author GXH is a member of the Editorial Board for the World Journal of Pediatrics. The paper was handled by the other Editor and has undergone a rigorous peer-review process. Author GXH was not involved in the journal's review of, or decisions related to, this manuscript. The authors have no conflicts of interest to disclose."

"Funding This study was supported by the China Postdoctoral Science Foundation (No. 2020M681674, to GXH), and the Nanjing Medical Science and Technique Development Foundation (No. YKK20130, to LZ)."