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American researchers estimated that the vaccine allowed babies whose mothers had been vaccinated during pregnancy to have 61% less risk of being hospitalized.
Pregnant women vaccinated against Covid-19 during their pregnancy give birth to babies who are well protected against the virus. This is the result of a new American study published Tuesday, February 15, 2022 by the US Centers for Disease Control and Prevention (CDC).
To carry out their work, American researchers from pediatric hospitals and the CDC examined children under 6 months of age between July 2021 and January 2022. Among 379 hospitalized infants, 176 were admitted for Covid infection. -19 and 203 for other health conditions.
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Stronger protection with vaccination at the end of pregnancy
Scientists estimated that the vaccine reduced the risk of hospitalization by 61% in babies whose mothers were vaccinated during pregnancy. The researchers explain this protection by the transfer of antibodies against the virus between a pregnant mother and her baby via the placenta.
In addition, protection increased to 80% in babies whose mothers were vaccinated 21 weeks to 14 days before delivery. Effectiveness fell to 32% in babies whose mothers were vaccinated earlier in pregnancy. But given the small sample size, the study authors said the latter figure should be interpreted with caution.
In addition, 84% of babies hospitalized due to Covid-19 were born to mothers who were not vaccinated. The mother of the only baby who died during the study was not vaccinated.
The study did not take into account women vaccinated before their pregnancy. The women included had received either the two doses or the second dose of the Pfizer or Moderna vaccine during their pregnancy. “In summary, maternal vaccination is a very important way to help protect these young babies”CDC researcher Dana Meaney-Delman said during a press briefing.