Comment on “Current evidence of SARS-CoV-2 vertical transmission: an integrative review”

Abstract

Dear Editor, We read with great interest the study by Oliveira et al. 1 . In their article, the authors have reviewed the current scientific evidence of vertical transmission related to coronavirus disease 2019 . However, some concerns should be addressed.First, only MEDLINE (via PubMed) and LILACS databases were searched for potential articles, which resulted in a significant reduction in the number of search results. Currently, they were more than 15 studies with available clinical characteristics of pregnant women and detailed neonatal outcomes. Other articles published up until 17th June 2020 meeting inclusion criteria can be seen in Table 1 2 -20 .Second, the authors stated that "This review was performed according to a standard protocol for systematic reviews, which was based on the methodological manuals of the Preferred