GBS vaccines in the UK: a round table discussion [version 1; peer review: 4 approved]

Thorn, Natasha; Guy, Rebecca L; Karampatsas, Konstantinos; Powell, Mair; Walker, Kate F; Plumb, Jane; Khalil, Asma; Greening, Vanessa; Eccleston, Emma; Trotter, Caroline; Andrews, Nick; Rush, Lynne; Sharkey, Claire; Wallis, Lauren; Heath, Paul; Le Doare, Kirsty

Abstract

Background
Group B streptococcus (GBS) remains a leading cause of infant sepsis, meningitis and death despite intrapartum antibiotic prophylaxis. A vaccine is urgently required, and two candidates are in advanced clinical trials. For successful GBS vaccine implementation, especially if a vaccine is licensed based on an immunological threshold, there must be cross-sector engagement, effective advocacy, robust plans for phase IV studies and equitable access.

Meeting
A round-table discussion, held at St George’s University of London, reviewed the current position of GBS vaccines in the UK context, focusing on phase IV plans, convening a diverse group of stakeholders from across the UK, with a role in GBS vaccine licensure, advocacy, implementation or effectiveness evaluation.

Presentations outlined the latest UK epidemiology, noting the rising infant invasive GBS (iGBS) infection rates from 1996 to 2021 for both early and late onset disease, with the highest disease rates in Black infants (1.1/1000 livebirths vs white infants (0.81/1000 livebirths). Potential coverage of the candidate vaccines was high (>95%). Regulatory input suggested that EU regulators would consider waiving the need for a pre-licensure efficacy study if a putative correlate of protection could be adequately justified. Phase IV study methodologies for a GBS vaccine were considered, largely based on previous UK maternal vaccine assessments, such as a nationwide cohort study design using a vaccine register and a maternal services dataset. Other strategies were also discussed such as a cluster or stepped-wedge randomised trial to evaluate implementation outcomes. Opportunities for advocacy, education and engagement with additional key partners were discussed and identified.

Conclusions
With an approved GBS vaccine a near possibility, planning of phase IV studies and identification of critical barriers to implementation are urgently needed. Cross-sector engagement is essential and will facilitate a successful pathway.

Citation

Thorn, N., Guy, R. L., Karampatsas, K., Powell, M., Walker, K. F., Plumb, J., Khalil, A., Greening, V., Eccleston, E., Trotter, C., Andrews, N., Rush, L., Sharkey, C., Wallis, L., Heath, P., & Le Doare, K. (2024). GBS vaccines in the UK: a round table discussion [version 1; peer review: 4 approved]. F1000Research, 13, Article 519. https://doi.org/10.12688/f1000research.147555.1

• Journal Article Type: Article
• Acceptance Date: May 8, 2024
• Online Publication Date: May 21, 2024
• Publication Date: May 21, 2024
• Deposit Date: Jan 14, 2025
• Publicly Available Date: Jan 14, 2025
• Journal: F1000Research
• Electronic ISSN: 2046-1402
• Publisher: F1000Research
• Peer Reviewed: Peer Reviewed
• Volume: 13
• Article Number: 519
• DOI: https://doi.org/10.12688/f1000research.147555.1
• Keywords: Streptococcus agalactiae - immunology, United Kingdom - epidemiology, Streptococcal Vaccines - therapeutic use - immunology, early-onset disease, Female, Streptococcal Infections - prevention & control - epidemiology, Humans, neonate, maternal vaccines, Group B streptococcus, invasive GBS disease, late-onset disease, vaccines
• Public URL: https://nottingham-repository.worktribe.com/output/39711665
• Publisher URL: https://f1000research.com/articles/13-519