Global Alignment of Immunisation safety Assessment in pregnancy (GAIA)

Project Overview

GAIA is a two-year project, coordinated by the Brighton Collaboration Foundation with core funding by the Bill & Melinda Gates Foundation for consortium partners to concert activities. GAIA outputs will be developed in close interaction with a global network of volunteer experts to ensure global applicability and usefulness of the standards developed.


The aim of the GAIA consortium is to improve clinical outcome data of vaccine safety or effectiveness studies (investments) on immunization in pregnancy with specific focus on LMIC. The end results will be published on the GAIA website.


Case definitions of key obstetric and neonatal outcomes
A set of about 20 standardised case definitions for key obstetric and neonatal events for global monitoring of immunisation in pregnancy
Accompanied by a larger glossary of well-defined enabling terms: terms of relevance to monitoring of many key events

Shared terminology and code mapping

A structured ontology of terms to demonstrate hierarchical and conceptual dependencies to promote a common understanding and shared language, synonyms of enabling terms and those describing key events
Case definitions with the glossary and ontology of terms will enable creation of a map of disease codes used in healthcare databases, hospital discharge diagnoses and primary care claims registries
Standard blocks of case identification algorithms are developed for observational studies

Tools for harmonised data collection

Minimal guidance for collection, analysis and presentation of clinical safety outcome data of immunisation in pregnancy studies
A data collection matrix as a checklist informing protocol writing and the development of case report forms
An online tool for automated case classification (single case or batch classification) of events according to the standardised case definitions

Evaluation and implementation

Investigator and stakeholder meeting determining the needs and requirements of the various stakeholders and sharing experience with implementation of the interim standards and guidance documents.
Targeted stakeholder consultations and solicitation of feedback from investigators and parallel projects, partners from LMIC for the evaluation of applicability and usefulness of the standards and tools developed.
The finalised standards will be submitted for review and recommendation by pertinent technical, public health, and regulatory bodies

How to get involved?

Would you like to be a volunteer reviewer of codes and definitions for the GAIA project? If so, please send your details to