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Placenta showed focal expression of SARS-CoV-2 nucleocapsid (Nc) and spike (Sp) protein in syncytiotrophoblast (arrow) and SARS-CoV-2 viral RNA in scattered individual trophoblast cells (arrowhead). On syncytiotrophoblast, there was weak to moderate focal ACE2 and diffuse expression of basigin (CD147), a tentative binding receptor for SARS-CoV-2 spike protein; PDL-1 expression was diffuse and strong. Immunoperoxidase, diaminobenzidine, 200x; in-situ hybridization (ISH), 600x.
