The Potential Confounders Hiding in a United States Cohort About Severe Acute Respiratory Syndrome Coronavirus 2 Infection During Pregnancy

Abstract

To the Editor—With great interest, we read the article by Regan et al [ 1]. In their cohort study, the authors investigated the association between prenatal severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and increased risk of adverse pregnancy outcomes. These findings support previous studies that suggest maternal SARS-CoV-2 infection harms fetal health. However, there are some issues that should be discussed.