key: cord-0876901-qappmh4v authors: Kotlyar, Alexander M.; Tal, Reshef title: Reply to Cai et al. concerning ”Vertical transmission of coronavirus disease 2019: a systematic review and meta-analysis” date: 2021-09-29 journal: Am J Obstet Gynecol DOI: 10.1016/j.ajog.2021.09.029 sha: 30861ff2ec725f4846767808f7aab2c47298c6fc doc_id: 876901 cord_uid: qappmh4v nan We would like to thank you for the points raised and the opportunity to respond with regards 23 to our paper (1) . 24 Vertical 74 Transmission of COVID-19: A Systematic Review and Meta-Analysis Clinical features and obstetric and 77 neonatal outcomes of pregnant patients with COVID-19 in Wuhan, China: a retrospective, 78 single-centre, descriptive study Vertical Transmission in Neonates Born to Mothers With Coronavirus Disease 2019 (COVID-81 19) Pneumonia Clinical characteristics and intrauterine vertical 83 transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of 84 medical records Clinical characteristics and risk 86 assessment of newborns born to mothers with COVID-19 et al. (2) (3) (4) (5) . We believe this goes beyond us and exemplifies the consequences of publishing 44 duplicate datasets. Ultimately, the inclusion of these data does not change the conclusion of 45 the meta-analysis, as noted by the authors of this letter as well as our own sub-analyses. 46Specifically, if we removed these four studies from our Chinese cohort/case series meta-