ABSTRACT Whether mother-to-infant SARS-CoV-2 transmission can occur during breastfeeding and, if so, whether the benefits of breastfeeding outweigh this risk during maternal COVID-19 illness remain important questions. Using RT-qPCR, we did not detect SARS-CoV-2 RNA in any milk sample (n = 37) collected from 18 women following COVID-19 diagnosis. Although we detected evidence of viral RNA on 8 out of 70 breast skin swabs, only one was considered a conclusive positive result. In contrast, 76% of the milk samples collected from women with COVID-19 contained SARS-CoV-2-specific IgA, and 80% had SARS-CoV-2-specific IgG.



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Citation: Ryan M. PaceJanet E. WilliamsKirsi M. JärvinenMandy B. BelfortChristina D. W. PaceKimberly A. LackeyAlexandra C. GogelPhuong Nguyen-ContantPreshetha KanagaiahTheresa FitzgeraldRita FerriBridget YoungCasey Rosen-CaroleNichole DiazCourtney L. MeehanBeatrice CafféMark Y. SangsterDavid TophamMark A. McGuireAntti SeppoMichelle K. McGuire