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This is a prospective cohort study published March 25 in the American Journal of Obstetrics and Gynecology.
DOI: https://doi.org/10.1016/j.ajog.2021.03.023
– COVID-19 vaccine response in pregnant and lactating women: a cohort study
Reported here: https://www.medscape.com/viewarticle/948154
“Pregnant and breastfeeding women who receive an mRNA COVID-19 vaccine develop a strong immune response and produce antibodies that can transfer to the fetus through the placenta and to newborns through breast milk”
“The findings revealed that the antibody response to vaccination in this cohort was greater than that from a COVID-19 infection during pregnancy. Though the researchers detected SARS-CoV-2 antibodies in umbilical cord blood and breast milk, it’s not yet known how much protection these antibodies might provide to newborns.”