This indicator displays the proportion of countries using WHO’s global database VigiBase to report at least one serious adverse event following immunization (AEFI) per 1 million population, a marker that demonstrates a commitment to collecting robust, quality safety data to support policy making at all levels. Sharing AEFI data between all stakeholders within countries is critical to ensure that timely safety signals support an appropriate response at the country level. Further, pooling such reports into a global database can provide insights into trends and regional characteristics of very rare but significant AEFI that may be difficult to detect through national aggregate data.

Over the decade, immunization stakeholders committed to safety and transparency expect to see increasing numbers of countries using VigiBase to document detailed, individual case reports on serious AEFI. At present, 51 countries are adequately reporting through VigiBase.