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Placenta from the same maternal-neonatal dyad as in Figure 1 in which there was intrauterine maternal-fetal transmission of COVID-19. The confluent areas of brown staining at the periphery of the chorionic villi represents trophoblast infection identified by immunohistochemistry using an antibody to SARS-CoV-2 nucleocapsid protein. Positive staining is also present in inflammatory cells in the intervillous space. This placenta was described in [23]. ×20 magnification.
