Viral populations of SARS-CoV-2 in upper respiratory tract, placenta, amniotic fluid and umbilical cord blood support viral replication in placenta. (October 2021) - Piñana, Maria; Abril, Josep F.; Andrés, Cristina; Silgado, Aroa; Navarro, Alexandra; Suy, Anna; Sulleiro, Elena; Pumarola, Tomàs; Quer, Josep; Antón, Andrés