Since the start of the vaccination campaign, nearly 5 million French people have received a first injection of the vaccine against Covid-19 according to the Covid Tracker platform. Israeli researchers recently wondered about the transmission of immunity conferred by the vaccine from pregnant women to their children. In one study, they notably observed the presence of antibodies in newborns whose mothers had received both doses of the vaccine before giving birth. This research was pre-published on the MedRvix platform, but it has not been peer-reviewed.
Covid-19: Does vaccination in pregnant women confer immunity to the fetus?
For the purposes of the study, scientists recruited 20 pregnant women treated at Hadassah Medical Center in Jerusalem, Israel, last February. The patients had been vaccinated during their third trimester of pregnancy. The gap between the first and second dose of vaccine and delivery was on average 11 to 33 days.
After childbirth, the researchers collected maternal sera and blood samples from the umbilical cord in order to detect the presence of immunity conferred by the vaccine in the infants. As a result, all of the participants and their children had antibodies against the coronavirus. 'Our findings demonstrate that immunizing pregnant women can provide maternal and neonatal protection against Covid-19 infection,' the study authors said.
Results to be taken with caution
Another US research, pre-published on MedRvix, also evaluated the case of a baby girl born with antibodies to Sars-CoV-2. Three weeks before her delivery, her mother had received a single injection of the Moderna messenger RNA vaccine. Thanks to a blood sample from the umbilical cord, scientists found the presence of antibodies in the infant. 'There is a potential for protection and reduction of the risk of infection linked to Sars-CoV-2 thanks to maternal vaccination,' said Paul Gilbert, co-author of the study and researcher at Florida Atlantic University to our colleagues. Of the American channel ABC.
However, these two studies were carried out on small groups of patients. Their conclusions should therefore be taken with hindsight. Research with a larger number of participants is needed to attest to these results. In addition, these two studies have not yet been validated by a scientific committee and published in a scientific journal.
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