New Study Shows COVID-19 Vaccination Protects Pregnant Women and Babies

Research from the University of British Columbia (UBC) indicates that COVID-19 vaccination significantly lowers the risks of severe illness for pregnant women and their infants. This substantial study, published in the journal JAMA, analyzed nearly 20,000 pregnancies across Canada and revealed that vaccinated individuals experienced fewer complications, such as hospitalization and premature births.

The UBC-led study found that pregnant individuals who received the COVID-19 vaccine were approximately 60 per cent less likely to be hospitalized and 90 per cent less likely to require intensive care compared to their unvaccinated counterparts. This connection remained strong even as the virus transitioned from the Delta variant to Omicron and its various sublineages.

Key Findings on Vaccination Impact

Dr. Deborah Money, a professor of obstetrics and gynaecology at UBC and the senior author of the study, emphasized the importance of these findings. “Our findings provide clear, population-level evidence that COVID-19 vaccination protects pregnant people and their babies from serious complications,” she stated. Notably, the study highlighted that vaccination also correlated with a 20 per cent decrease in premature births during the Delta wave and a 36 per cent reduction during the Omicron wave.

Furthermore, the analysis indicated that individuals vaccinated during pregnancy exhibited even lower rates of preterm birth and stillbirth than those vaccinated before becoming pregnant. “There is never a bad time to be vaccinated—whether you’re currently pregnant or planning a pregnancy,” said Dr. Elisabeth McClymont, the study’s lead author and assistant professor in UBC’s department of obstetrics and gynaecology. “Our data suggest there may be added benefits to receiving the vaccine during pregnancy.”

Guidance for Policy and Public Health

These findings arrive at a time when vaccine recommendations for pregnant people are being reassessed in various regions. In the United States, the Advisory Committee on Immunization Practices (ACIP) recently refrained from including a specific recommendation for COVID-19 vaccination during pregnancy in its updated adult immunization schedule. In contrast, health officials in Canada and the World Health Organization continue to endorse vaccinations for this demographic.

Dr. Money asserted that the study’s outcomes provide essential information for policymakers and healthcare providers. “The body of evidence is overwhelmingly clear: COVID-19 vaccination is safe and effective in pregnancy,” she remarked. This research reinforces public health guidelines recommending vaccination for pregnant individuals.

The study utilized data from nine Canadian provinces and one territory, tracking outcomes from pregnancies affected by SARS-CoV-2 from April 2021 to December 2022. The research team adjusted for various factors, including age, body mass index, and pre-existing conditions such as hypertension and diabetes, yet found that vaccination consistently correlated with significantly reduced hospitalization risks.

Researchers also emphasized the need for including pregnant individuals in future vaccine research, particularly in light of potential respiratory virus outbreaks. “Pregnancy is a unique period of vulnerability but also of opportunity for prevention,” Dr. McClymont explained. “This study reinforces how vaccination can make a real difference for maternal and newborn health.”

The study received funding from the Public Health Agency of Canada, the COVID-19 Immunity Task Force, the Canadian Institutes of Health Research, and the BC Women’s Health Foundation. As discussions about vaccine guidelines continue, this research provides compelling evidence of the protective benefits vaccination offers to pregnant women and their babies.