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Early research shows that vaccinated pregnant mothers transmit Covid-19 antibodies to their children through breast milk and in utero.
Many preliminary studies show that pregnant women who received an mRNA vaccine, such as those from Pfizer or Moderna, had Covid-19 antibodies in their umbilical cord blood.
Another study found antibodies in breast milk, which means that some immunity could be transferred to children during pregnancy and after birth.
Duke University Vice President for Obstetrics and Quality Brenna Hughes said The Washington Post that some papers that have not yet been peer reviewed are “the first to show what we hoped to be true, namely that these vaccines could be potentially protective through antibodies transmitted to the fetus.”
She added that “concerns about the risks and possible harm can be proven quite the opposite. In fact, it can be proven that vaccines do provide protection to the developing fetus.”
A South Florida healthcare worker was vaccinated three weeks before giving birth to a girl with anti-Covid-19 antibodies, CBS News reported.
Dr Paul Giblert and Dr Chad Rudnick wrote in a pre-printed study that “antibodies are detectable in a newborn’s cord blood sample after a single dose of the Moderna COVID-19 vaccine. Thus, there is a potential to protect and reduce the risk of Sars-CoV-2 infection with maternal vaccination ”.
A preprinted study, not yet peer reviewed, examined 131 vaccinated women, 84 of whom were pregnant. The study showed that pregnant women had similar immune responses and would therefore likely benefit from as much protection from the vaccine as women who were not pregnant.
Dr Andrea Edlow, a specialist in maternal and fetal medicine at Massachusetts General Hospital, co-author of the study, told CBS News: “Maternal antibodies generated by the vaccine have been detected in the umbilical cord blood of all 10 babies who [were] delivered during our study period. ”
She added: “Our data suggests that receiving the two injections of the mRNA vaccine leads to improved transfer of antibodies to newborns.”
The next phase of the studies will be to determine how effective antibodies are for newborns and for how long they will provide protection.
Denise Jamieson, director of the department of gynecology and obstetrics at Emory University, said The Washington Post that it is “important to remember that the main reason we are so focused on vaccinating pregnant women against Covid is because we know mothers are at increased risk of serious illness,” adding that this also exposes babies at increased risk.
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