The maternal blood samples were centrifuged for 10 min at 23 °C at 3350 rpm/rcf, pipetted and stored in cryotubes in a laboratory freezer at −80 °C. 4.3. Pediatric Emergency Admission From the SARS-CoV-2-negative PREGCO cohort [6] a control group was matched to the 36 SARS-...