First COVID-19 vaccine study for pregnant women launches in Southampton

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The first COVID-19 vaccine study in the UK recruiting pregnant women has been launched across several National Institute of Health Research sites, including University Hospital Southampton.

The phase 2/3 study aims to further understand the safety, tolerability and immunogenicity of the Pfizer-BioNTech COVID-19 vaccine in healthy pregnant women, with approximately 235 volunteers involved throughout the UK.

Following updated guidance from the Joint Committee on Vaccination and Immunisation (JCVI) released in April, pregnant women are now offered approved COVID-19 vaccines at the same time as the rest of the UK population, based on their age and clinical risk group. Real-world data from the United States has been collected, in which over 100,000 pregnant women have been vaccinated (mainly with mRNA vaccines including Pfizer-BioNTech), without any safety concerns raised.

The role of this placebo controlled study (COVID-19 Vacc Maternal Immunisation) is to provide more robust information on the vaccine immune response in pregnancy, as well as safety reporting and the potential transfer of maternal antibodies to infants.

Each participant enrolled in the study will initially receive either two doses of the vaccine or a placebo 21 days apart. All participants will be unblinded one month post pregnancy, and those who were given the placebo jab (a salt water solution that does not contain any active ingredients) will receive the Pfizer-BioNTech COVID-19 vaccine.

Recruitment will begin this week at the UK sites involved. The study has already been running in the US since February 2021. Research participants will be required to answer questionnaires about their health, provide blood samples, complete an e-diary and will receive extra monitoring while on the study, compared to those who receive a vaccine through the rollout.

All volunteers will need to visit their site for four planned visits before their baby is born and then two more follow up appointments after the baby is born.

Participants for the study will be identified via obstetricians and midwives at the hospital sites involved, with the study doctor determining whether each pregnant woman and their unborn baby would be suitable. Participation in the study is completely voluntary and participants can leave the study at any time.

Dr Chrissie Jones, Associate Professor in Paediatric Infectious Diseases at University of Southampton, and Chief Investigator for the study said:

"While we have a large amount of real-world data which tells us that it's safe for pregnant women to receive approved COVID-19 vaccines, the data gathered from a controlled research study like this is important because it will give us more information about the vaccine immune response in pregnant women, including the transfer of maternal antibodies to infants.

“All women taking part in the study will receive two doses of the approved Pfizer-BioNTech vaccine, as well as additional monitoring and support from their local research team."

For more information, please contact uhs.southamptoncrf@nhs.net or call 023 8120 4989.

Posted on Wednesday 19 May 2021