Skip to Content

Pregnant Women Show Robust Immune Response to COVID-19 Vaccine

MONDAY, April 5, 2021 -- Vaccination of pregnant and lactating women can confer robust maternal and neonatal immunity to COVID-19, according to a study published online March 25 in the American Journal of Obstetrics & Gynecology.

Kathryn J. Gray, M.D., Ph.D., from Brigham and Women's Hospital in Boston, and colleagues evaluated the immunogenicity and reactogenicity of COVID-19 mRNA vaccination in pregnant and lactating women compared to nonpregnant controls and natural COVID-19 infection in pregnancy. Analysis included 84 pregnant, 31 lactating, and 16 nonpregnant women; 37 pregnant women four to 12 weeks from natural infection were also included in the analysis. Titers of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Spike and Receptor Binding Domain (RBD) immunoglobulin (Ig)G, IgA, and IgM were measured in serum (131 participants) and breastmilk (31 participants) at baseline, second vaccine dose, two to six weeks after second vaccine, and delivery (10 participants).

The researchers found that vaccine-induced antibody titers were equivalent in pregnant and lactating compared to nonpregnant women. All titers following vaccination were significantly higher than those induced by natural infection during pregnancy. Vaccine-induced antibodies were detected in all umbilical cord blood and breastmilk samples. Compared to maternal serum, neutralizing antibody titers were lower in umbilical cord serum, although this finding did not achieve statistical significance. The second vaccine dose increased SARS-CoV-2-specific IgG detected in maternal blood and breastmilk, but not IgA.

"We now have clear evidence the COVID vaccines can induce immunity that will protect infants," a coauthor said in a statement. "We hope this study will catalyze vaccine developers to recognize the importance of studying pregnant and lactating individuals, and include them in trials."

Several authors disclosed financial ties to the biotechnology industry.

Abstract/Full Text (subscription or payment may be required)

© 2021 HealthDay. All rights reserved.

Read this next

Guidance Updated for Assessing Allergy Risk of COVID-19 Vaccines

THURSDAY, April 22, 2021 -- In an editorial published online April 15 in the Journal of Allergy and Clinical Immunology: In Practice, an updated pre-COVID-19 vaccine risk...

Decrease Seen in Abusive Head Trauma for Young Children During Pandemic

THURSDAY, April 22, 2021 -- There was a decrease in hospital admissions for children younger than 5 years diagnosed with abusive head trauma (AHT) during the COVID-19 pandemic,...

Recovered but RT-PCR-Positive Individuals Unlikely to Transmit SARS-CoV-2

THURSDAY, April 22, 2021 -- Individuals who have clinically recovered from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and continue to test positive for...

More News Resources

Subscribe to our Newsletter

Whatever your topic of interest, subscribe to our newsletters to get the best of in your inbox.