Evaluation of the transmission of SARS-CoV-2 through breast milk: a case series

Whether severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is transmitted through breast milk remains controversial. This study aimed to determine the presence of SARS-CoV-2 in breast milk and assess its transmissibility to the child in infancy. Eleven samples were obtained from nine mothers with coronavirus disease 2019 (COVID-19). All but one sample had negative results on a reverse transcription-quantitative polymerase chain reaction. Among nine children, five were diagnosed with COVID-19, including one child whose mother's milk tested positive. Although SARS-CoV-2 RNA was detected in breast milk, its possible transmission via breastfeeding could not be established. Thus, we conclude that the physical attachment between mother and child is a conceivable transmission route.

Automated summary

This study aimed to determine if SARS-CoV-2 is transmitted through breast milk and assess its transmission to infants. Out of the breast milk samples obtained from nine mothers with COVID-19, one tested positive, and five infants were diagnosed with COVID-19, including one whose mother's milk was positive. Although SARS-CoV-2 RNA was detected in breast milk, the possibility of transmission through breastfeeding could not be established. Therefore, we conclude that close physical contact between mother and child is a conceivable route of transmission.