Thomas et al examined the occurrence of SARS-CoV-2 in placental and fetal involvement for women who were COVID-19 positive during delivery, or in fetal tissues in the case of pregnancy loss. Using in situ hybridization and immunohistochemistry, it was found that 1.02% of the placentas had the virus, a low level of placental involvement. This did not correlate to the severity of the disease. Mother to child transmission (MTCT) was observed in only one fetus. Thus, placental involvement and MTCT is rare, indicating that the placenta is protective against COVID-19.