“…The prevalence of placental infection in COVID-19-positive women is low (7.7–21%) [ 73 ].A few studies have demonstrated SARS-CoV-2 placental infection diagnosis by ISH, IHC, RT-PCR, and transmission electron microscopy (TEM) [ 11 , 15 , 31 , 34 , 52 , 53 , 58 , 61 , 62 , 64 , 65 , 67 , 71 , [74] , [75] , [76] , [77] , [78] , [79] , [80] , [81] , [82] , [83] , [84] , [85] , [86] , [87] , [88] , [89] , [90] , [91] , [92] ]. Viral RNA, proteins, and particles were mainly localized in the syncytiotrophoblasts [ 52 , 58 , 61 , 62 , 64 , 80 , 81 , 86 ].…”