Chest CT features of children infected by 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). Conflict of interestThe authors have no conflicts of interest to disclose. Author Xuhua Ge is a member of the Editorial Board for World Journal of Pediatrics. The paper was handled by the other Editor and has undergone rigorous peer review process. Author Xuhua Ge was not involved in the journal's review of, or decisions related to, this manuscript. Informed consentWritten informed consent was obtained from each enrolled patient. Conflict of interest The authors have no conflicts of interest to disclose. Author Xuhua Ge is a member of the Editorial Board for World Journal of Pediatrics. The paper was handled by the other Editor and has undergone rigorous peer review process. Author Xuhua Ge was not involved in the journal's review of, or decisions related to, this manuscript."

"Funding This study was supported by the China Postdoctoral Science Foundation 2020M681674 (to Xuhua Ge) and The Nanjing Medical Science and Technique Development Foundation (No.YKK20130) (to Zhuo Li)."