Detection of spike protein in term placentas of COVID-19 vaccinated and/or SARS-CoV-2 infected women

The spike protein of SARS-CoV-2 has been be detected in placental Hofbauer and Trophoblast cells as well as villous endothelia after infection and vaccination indicating a possible transplacental transfer or uptake. These findings may suggest a potential for transplacental transfer or cellular uptake; however, the extent, mechanisms, and clinical significance of this phenomenon remain to be fully understood. Clinical trial registration: DRKS00022506.