Shook, Lydia L, Ai -Ris Y Collier, Ilona T Goldfarb, Khady Diouf, Babatunde O Akinwunmi, Nicola Young, Alec Brown, et al. 2021. “Vertical Transmission of SARS-CoV-2: Consider the Denominator.”. American Journal of Obstetrics & Gynecology MFM 3 (4): 100386.