Ask to take part

Contact the study team using the details below to take part. If there are no contact details below please ask your doctor in the first instance.

Contact Information:

Royal Free Hospital, London - Professor Rezan Abdul-Kadir / Natasha Ford
020 3758 2000, extension 33863
rf-tr.rhandcresearch@nhs.net


Royal Cornwall Hospital, Truro - Dr Karen Watkins
01872 228856
Rcht.cioscrdc@nhs.net


St Mary’s Hospital, Imperial - Dr Edward Mullins / Jena Strawford / Farhana Mehar
020 3312 6948
imperial.paediatricresearch@nhs.net


Princess Royal Hospital, Telford - Professor William Parry-Smith
01952 565939
Sath.research.maty@nhs.net


Southampton General Hospital - Professor Chrissie Jones / Nicki Martin
023 8220 6856
Reprohealthresearcht@uhs.nhs.uk


St Mary’s Hospital, Manchester - Dr Teresa Kelly / Debbie Pillar / Anj Chambers
0161 701 3480
Beatrix@mft.nhs.uk


St James’s University Hospital, Leeds - Dr Nigel Simpson
0113 206 6473
leedsth-tr.beatrixstudy@nhs.net


St Michael’s Hospital, Bristol - Dr Sneha Basude
0117 342 5756
research_st.michaels@uhbw.nhs.uk


St George’s Hospital, London - Professor Asma Khalil / Gauri Kumar
020 8725 5382
BeatrixStudy@sgul.ac.uk


John Radcliffe Hospital, Oxford - Dr Manu Vatish / Kate Bailey / Jude Mossop
01865 221107
clinicalresearchgroup@wrh.ox.ac.uk


Study Location:

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Be Part of Research - Trial Details - BEATRIX: A Study to Learn About a Group B Streptococcus Vaccine in Healthy Pregnant Women and Their Babies

BEATRIX: A Study to Learn About a Group B Streptococcus Vaccine in Healthy Pregnant Women and Their Babies

Medical Conditions

Group B Strep Infection
Group B Streptococcus
Group B Streptococcus Infection


This information is provided directly by researchers, and we recognise that it isn't always easy to understand. We are working with researchers to improve the accessibility of this information. In some summaries, you may come across links to external websites. These websites will have more information to help you better understand the study.


BEATRIX (group B strEptococcus mATeRnal and Infant VaX study) The purpose of this study is to learn about the safety and how the group B streptococcus (GBS) vaccine works in pregnant women and their babies.

This study is seeking healthy pregnant participants:

* aged 49 or younger who can join. * between 24 and 36 weeks of gestation ("Gestational age" is a medical term used to describe how far along your pregnancy is) * had a fetal ultrasound examination performed with no major fetal abnormalities observed * documented negative for HIV, syphilis and Hepatitis B All participants in this study will receive only 1 shot in an arm. This could either be a group B streptococcus 6-valent polysaccharide conjugate vaccine (GBS6) or placebo. Placebo is an inactive substance used in the study for comparison purposes; in this study, the placebo injection will be saline (saltwater). The pregnant participants may take part in this study for a maximum of 14 months (6 months after delivery) , and their babies for about 12 months after they are born. The pregnant participants will need to visit the research site at least 3 to 4 times with some visits permitted to occur over the telephone.

A subset of infants will be asked to take part in the study for up to 19 months. The subset will receive diphtheria toxoid-containing vaccine and/or pneumococcal vaccine following each country's standard immunization plan and have blood drawn 1 month after completion of the primary and/or toddler (booster) doses.

Start dates may differ between countries and research sites. The research team are responsible for keeping the information up-to-date.  

The recruitment start and end dates are as follows:

Aug 2025 Nov 2028

INTERVENTIONAL

Intervention Type : BIOLOGICAL
Intervention Description : Multivalent Group B streptococcus vaccine

Intervention Arm Group : GBS6;

Intervention Type : BIOLOGICAL
Intervention Description : Saline Control

Intervention Arm Group : Placebo;

Intervention Type : BIOLOGICAL
Intervention Description : Vaccine administered in a subset of infant participants as per the national immunization schedule

Intervention Arm Group : Infanrix hexa;

Intervention Type : BIOLOGICAL
Intervention Description : Vaccine administered in a subset of infant participants as per the national immunization schedule

Intervention Arm Group : Prevenar 20;

Intervention Type : BIOLOGICAL
Intervention Description : Vaccine administered in a subset of infant participants as per the national immunization schedule

Intervention Arm Group : Pediarix;

Intervention Type : BIOLOGICAL
Intervention Description : Vaccine administered in a subset of infant participants as per the national immunization schedule

Intervention Arm Group : Prevnar 20;

Intervention Type : BIOLOGICAL
Intervention Description : Vaccine administered in a subset of infant participants as per the national immunization schedule

Intervention Arm Group : Infanrix;



You can take part if:



You may not be able to take part if:


This is in the inclusion criteria above


Below are the locations for where you can take part in the trial. Please note that not all sites may be open.

  • Wythenshawe Hospital
    Manchester
    M23 9LT
  • Bristol Royal Hospital for Children
    Bristol
    BS2 8BJ
  • St. George's Hospital
    London
    England
    SW17 0QT
  • Southampton General Hospital
    Southampton
    Hampshire
    SO16 6YD
  • The Royal Cornwall Hospital
    Truro
    England
    TR1 3LJ
  • The John Radcliffe Hospital
    Oxford
    Oxfordshire
    OX3 9DU
  • Royal Free Hospital
    London
    NW32QG
  • Bristol Royal Infirmary
    Bristol
    BS2 8EX
  • The Princess Royal Hospital
    Shropshire
    Telford AND Wrekin
    TF1 6TF
  • St Michael's Hospital
    Bristol
    Bristol, CITY of
    BS2 8EG
  • North Manchester General Hospital
    Manchester
    England
    M8 5RB.
  • St Mary's Hospital (Manchester University NHS Foundation Trust)
    Manchester
    Lancashire
    M13 9WL
  • Imperial College Healthcare NHS Foundation Trust - St Mary's Hospital
    London
    London, CITY of
    W2 1NY
  • Barnet Hospital
    London
    England
    EN5 3DJ
  • Bristol NHS Foundation Trust
    Bristol
    BS1 3NU
  • St James's University Hospital
    Leeds
    LS9 7TF

Princess Royal Hospital, Telford - Professor William Parry-Smith
01952 565939
Sath.research.maty@nhs.net


John Radcliffe Hospital, Oxford - Dr Manu Vatish / Kate Bailey / Jude Mossop
01865 221107
clinicalresearchgroup@wrh.ox.ac.uk


St Michael’s Hospital, Bristol - Dr Sneha Basude
0117 342 5756
research_st.michaels@uhbw.nhs.uk


Southampton General Hospital - Professor Chrissie Jones / Nicki Martin
023 8220 6856
Reprohealthresearcht@uhs.nhs.uk


Royal Free Hospital, London - Professor Rezan Abdul-Kadir / Natasha Ford
020 3758 2000, extension 33863
rf-tr.rhandcresearch@nhs.net


St Mary’s Hospital, Manchester - Dr Teresa Kelly / Debbie Pillar / Anj Chambers
0161 701 3480
Beatrix@mft.nhs.uk


Royal Cornwall Hospital, Truro - Dr Karen Watkins
01872 228856
Rcht.cioscrdc@nhs.net


St Mary’s Hospital, Imperial - Dr Edward Mullins / Jena Strawford / Farhana Mehar
020 3312 6948
imperial.paediatricresearch@nhs.net


St George’s Hospital, London - Professor Asma Khalil / Gauri Kumar
020 8725 5382
BeatrixStudy@sgul.ac.uk


St James’s University Hospital, Leeds - Dr Nigel Simpson
0113 206 6473
leedsth-tr.beatrixstudy@nhs.net



The study is sponsored by Pfizer




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Read full details for Trial ID: NCT07160244
Last updated 24 September 2026

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