Megan E. Trostle et al., "High antibody levels in cord blood from pregnant women vaccinated against COVID-19" https://www.ajogmfm.org/article/S2589-9333(21)00176-2/fulltext « These findings demonstrate transplacental antibody transfer following mRNA COVID-19 vaccination during pregnancy with 100% of cord blood specimens having high levels of anti-S antibodies. »