A recent cohort study conducted at Pennsylvania Hospital, Philadelphia involving 1714 participants assessed maternal and cord blood for the transfer of SARS-CoV-2 antibodies. Trial participants were from various ethnic backgrounds with ages ranging from 28-35 years. IgG and/or IgM was detected in 83 woman at the time of delivery and IgG was detected in the cord blood of 72 of the 83 infants. The transfer of antibodies occurred after symptomatic and asymptomatic infections during pregnancy.
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