The researchers say in the study that the effectiveness of the Pfizer Biontech and Moderna vaccines lies in their ability to stimulate the production of the correct antibodies, which are able to protect individuals from infection.The study, published in the American Journal of Obstetrics and Gynecology, included 36 newborns whose mothers received either the Pfizer or Moderna vaccines during pregnancy, and it was found that 100% of the babies had protective antibodies at birth.
It is reported that antibodies are produced in two ways, the first naturally after infection with the virus, and the second through vaccines, and the research team was able to distinguish between antibodies in the blood of newborns that were produced in response to natural infection, from those that were produced in response to vaccines.
This finding is important, because natural antibody responses to the coronavirus do not provide adequate protection for many people.Recent data from the Centers for Disease Control and Prevention (CDC) indicates that only 23 percent of pregnant women have received the vaccination, despite mounting evidence of the vaccine’s safety before giving birth.
Led by researchers from New York University’s Grossman School of Medicine, the study authors observed higher levels of antibodies in the cord blood of fully vaccinated mothers during the second half of their pregnancies. This finding provides evidence of transmission of immunity to the newborn, and thus protection from infection to infants during the first months of life.
More research is needed to determine how effective the infant’s antibodies are, how long the protection lasts, and whether vaccination in the second half of pregnancy may transmit higher levels of antibodies to fetuses than vaccination early in pregnancy, according to the science website Uric Alert.
And researchers revealed that the experiments that Pfizer is working on regarding pregnant women receiving the anti-Coronavirus vaccine, were complicated by the slow registration, which causes delays in results that help in knowing how vaccines affect them and their fetuses.
According to the Wall Street Journal, Pfizer closed registrations at a number of its trial sites in the United States this summer, after registering fewer than expected number of study participants.
According to the newspaper, the slow registration was prompted by government and medical guidelines that recommend pregnant women receive the vaccine based on recent research.
According to a government database, Pfizer has opened sites for its experiments outside the country, but the company’s spokeswoman did not comment on the status of the experiments.
Studies indicate that pregnant women are more susceptible to infection with the severely symptomatic coronavirus than non-pregnant women. Studies also point out that the chances of premature birth are greater for those who contract the infection.
In August, the US authorities urged pregnant women to be vaccinated against Corona, considering that the available data show that vaccines do not increase the risk of miscarriage.