New research suggests COVID-19 vaccination during pregnancy may significantly lower the risk of preeclampsia, a potentially life-threatening blood pressure disorder affecting expectant mothers and fetuses. Studies consistently show COVID-19 infection can worsen pregnancy outcomes, with unvaccinated pregnant women experiencing a 78% increased risk of preeclampsia. However, vaccination appears to offer a protective effect.
Preeclampsia, affecting 3% to 8% of pregnancies, is characterized by high blood pressure and often kidney damage. Scientists are exploring the role of viral infections like COVID-19 in triggering immune system changes and blood-vessel dysfunction, key processes behind preeclampsia.
The study analyzed data from over 6,500 pregnant women, finding that vaccination reduced preeclampsia risk. Booster shots appeared to provide additional defense. This aligns with existing guidance from organizations like the American College of Obstetricians and Gynecologists, which recommends updated COVID-19 vaccines for pregnant individuals.
While the study controlled for several factors, researchers acknowledge potential differences between vaccinated and unvaccinated groups. Future research will focus on the immune system's response to infections and vaccines in relation to preeclampsia.