A case report of newborn infant with severe COVID-19 in Mexico: Detection of SARS-CoV-2 in human breast milk and stool

•The first published case of newborn infant SARS-CoV-2 infection in Mexico.•SARS-CoV-2 RNA is detected in Human Breast Milk and Stool.•The intrauterine infection and breastfeeding could be mechanisms for vertical transmission of SARS-CoV-2. Although COVID-19 in pregnant women and their neonates has been demonstrated, there is not enough evidence about how this vertical transmission occurs. This report describes a SARS-CoV-2 infection in a 21-year-old mother-daughter duo at the time of birth, focusing on the viral RNA detection in the stool of both and the human breast milk.