Neonatal COVID-19(2) polymerase chain reaction(2) clinical sample(2) Viral(2) eight(2) Amniotic fluid(2) demonstrated(2) Blood(2) COVID-19(2) with COVID-19(2) Viral particles(2) Consensus(2) Umbilical cord(2) secretion(2) ACE-2(2) co-expression(2) Pregnancy(2) involved(2) Child(2) question(2) receptor(2) amniotic(2) Evidence(2) protective mechanisms(2) TMPRSS2(2) placental barrier(2) diagnostic(2) umbilical cord blood(2) clinical samples(2) performed(2)