Last reviewed 2026-04-23 · How we verify

GBS Vaccine

GBS Vaccine works by stimulating the body's immune system to produce antibodies against the bacteria that cause Group B strep infection.

GBS Vaccine works by stimulating the body's immune system to produce antibodies against the bacteria that cause Group B strep infection. Used for Prevention of Group B strep infection in pregnant women and newborns.

At a glance

Mechanism of action

The vaccine contains inactivated Group B strep bacteria, which are used to trigger an immune response. This immune response helps the body to recognize and fight off future infections caused by Group B strep.

Approved indications

• Prevention of Group B strep infection in pregnant women and newborns

Common side effects

• Pain, redness, or swelling at the injection site

Key clinical trials

• Preparing for Maternal GBS Vaccine Trials in Africa
• A Follow up Study of Group B Streptococcus (GBS)-NN/NN2 Vaccine in Healthy Volunteers
• A Follow-up Trial of GBS-NN/NN2 Vaccine in Healthy Pregnant Women (PHASE2, PHASE3)
• Phase I/II Study to a Assess the GBS-06 Vaccine Manufactured by Inventprise, Inc., in Healthy, Non-Pregnant, Adult Women of Childbearing Age. (PHASE1, PHASE2)
• Study to Evaluate the Safety, Tolerability and Immunogenicity of Three Doses of GBS Vaccine in Elderly Participants (PHASE1)
• Immunogenicity and Safety of GBS-NN/NN2 in Pregnant Women (PHASE2)
• Genomics and COVID-19 Vaccine Adverse Events
• Study to Assess a Booster Dose of GBS-NN/NN2 Vaccine (PHASE1)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

• GBS Vaccine CI brief — competitive landscape report
• GBS Vaccine updates RSS · CI watch RSS
• GlaxoSmithKline portfolio CI