Vertical transmission of SARS-CoV-2 - are there differences in rates of neonatal SARS-CoV-2 infection in two classification systems?

Neonatal SARS-CoV-2 infection due to vertical transmission has been summarised in recent reviews.1 2 However, the comparability of the underlying case reports and case series might be limited because of the often inconsistent use of different classification systems.1 COVID-19-Related Obstetric and Neonatal Outcome Study (CRONOS) was a prospective German registry enrolling pregnant women with confirmed SARS-CoV-2 infection during their pregnancy.3 4 The registry collected data between 3 April 2020 and 10 February 2023 with 130 of 686 (18.9%) German obstetric hospitals actively participating.4 To classify the timing and the probability of mother-to-child transmission of SARS-CoV-2-positive newborns in the CRONOS cohort we used the classification systems of the Nordic Federation of Societies of Obstetrics and Gynecology (NFSOG)5 and WHO.6 Within the study period, 8540 women had been registered in CRONOS, with 8032 final cases...
Source: Archives of Disease in Childhood - Fetal and Neonatal Edition - Category: Perinatology & Neonatology Authors: Tags: COVID-19 PostScript Source Type: research