Research team finds reason mothers rarely pass COVID-19 virus to fetus

Why are newborns born to mothers with COVID-19 rarely infected? Researchers at the Wayne State University School of Medicine and the Perinatology Research Branch of National Institute of Child Health and Human Development/National Institutes of Health in Detroit have found that placental cells minimally express the instructions, or mRNA, to generate the cell entry receptor and protease required by the virus that causes COVID-19 to invade human cells.