COVID-19 vaccination during pregnancy may reduce infants’ risk of infection during the early months of life, according to a recent study.
Infants of mothers vaccinated during pregnancy had a lower risk of positive COVID-19 infection in the first 4 months of life than infants of unvaccinated mothers, according to findings in JAMA Internal Medicine.1
The population-based cohort study, based in Norway, included 21,643 live births between September 1, 2021, and February 28, 2022. Nearly half of them (45%, n=9,739) were born to women who received a second or third dose of a COVID-19 during the last 2 trimesters of pregnancy.
Infants of those vaccinated during pregnancy were less likely to test positive for COVID-19 than infants of unvaccinated women, and less likely to test positive during the Delta surge (incidence rate, 1.2 vs 3.0 per 10,000 follow-up days; adjusted hazard ratio, 0.29; 95%CI, 0.19-0.46) than the Omicron surge (incidence rate, 7.0 vs 10.9 per 10,000 follow-up days; adjusted hazard ratio, 0.67; 95%CI, 0.57-0.79).
The study also showed a lower risk of infection among infants born to women who received a third dose of the vaccine than those who only received a second, suggesting a stronger level of protection after a booster dose.
Maternally transferred antibodies are critical in protecting a newborn infant from infection. While recent studies have shown that vaccinated women transfer COVID-19 antibodies in-utero and while breastfeeding, these study results provide further evidence to support the recommendation that pregnant women should receive the COVID-19 vaccine.
Reference
Carlsen EØ, Magnus MC, Oakley L, et al. Association of COVID-19 Vaccination During Pregnancy With Incidence of SARS-CoV-2 Infection in Infants. JAMA Internal Medicine. Published online June 1, 2022. doi:10.1001/jamainternmed.2022.2442
Contemporary OB/GYN Senior Editor Angie DeRosa gets insight on the current state of COVID-19 from Christina Han, MD, division director of maternal-fetal medicine at the University of California, Los Angeles, and member of its COVID-19 task force. Han is an active member of the Society for Maternal-Fetal Medicine and discusses the issues on behalf of SMFM.
Listen
Surge of antidepressant use seen among female adolescents during COVID-19
March 7th 2024A study revealed a significant increase in antidepressant prescriptions among adolescents and young adults during the COVID-19 pandemic, particularly among female adolescents, indicating exacerbation of pre-existing mental health challenges.
Read More
COVID-19 vaccination during pregnancy not linked to preterm birth
January 31st 2024A systematic review of 6 studies revealed that COVID-19 vaccination during pregnancy does not significantly increase the risk of preterm birth, providing crucial insights for public health policies and offering reassurance to healthcare providers and expectant mothers.
Read More