Pfizer, Moderna COVID-19 vaccines ‘do not appear to pose serious risk’ during pregnancy: Study

Washington: The mRNA COVID-19 vaccines by Pfizer/BioNTech and Moderna do not appear to pose any serious risk during pregnancy, according to new data published Wednesday in the New England Journal of Medicine.

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CNN reported that pregnant women with COVID-19 are at increased risk for severe illness and may be at increased risk for adverse outcomes, such as preterm birth, according to the US Centers for Disease Control and Prevention.

The study, along with existing research showing mRNA vaccines are effective in pregnant and lactating women, suggests that the benefits of the vaccines outweigh the risks.

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The new study reviewed data on 35,691 pregnant people between December 14, 2020, to February 28, 2021, from the CDC’s V-safe smartphone-based surveillance system, as well as data from the CDC’s Vaccine Adverse Event Reporting System (VAERS). All participants were pregnant and were between 16 to 54 years old.

According to the news outlet, the researchers followed a group within the V-safe system to gather more data on pregnancy outcomes and complications. This registry included 3,958 pregnant participants (out of the 35,691) who had received an mRNA vaccine.

The researchers found 827 completed pregnancies, and 115 (13.9 per cent) experienced a pregnancy loss, while 712 (86.1 per cent) resulted in a live birth. Preterm births occurred in 9.4 per cent of participants and only 3.2 per cent of these births were of small gestational age. There were no neonatal deaths reported.

There were 221 pregnancy-related adverse events reported to the CDC’s VAERS registry, and 46 of them were miscarriages.

“Although not directly comparable, calculated proportions of adverse pregnancy and neonatal outcomes in persons vaccinated against COVID-19 who had a completed pregnancy were similar to incidences reported in studies involving pregnant women that were conducted before the COVID-19 pandemic,” the results of the study read.

As reported by CNN, the study also looked at vaccine side effects during pregnancy. Researchers found the most common side effect from the vaccine was pain at the injection site, which appeared to occur more frequently in vaccine recipients who were pregnant. However, headache, muscle aches, chills and fever were reported less frequently by pregnant people.

The researchers also said that more long-term studies are needed to assess the safety of the COVID-19 vaccine during pregnancy and that this research should include follow up with a large population who are vaccinated early in pregnancy.

“Continued monitoring is needed to further assess maternally, pregnancy, neonatal, and childhood outcomes associated with maternal COVID-19 vaccination, including in earlier stages of pregnancy and during the preconception period. Meanwhile, the present data can help inform decision making about vaccination by pregnant persons and their health care providers,” the study’s discussion read.

The analysis only looked at Pfizer and Moderna shots, which are both based on newer mRNA technology, so the findings are not relevant to vaccines such as those made by AstraZeneca or Johnson & Johnson.

The new data, along with existing research showing mRNA vaccines are effective in pregnant and breastfeeding people, suggest that the benefits of the vaccines outweigh the risks.

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Mansoor Hameed

He is a part of the web desk which posts news from agencies like IANS, PTI and ANI.
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