A recent report shows that national AEFI (adverse event following immunisation) surveillance systems increasingly support the timely sharing of immunisation safety data, including individual case-based reports. When shared globally, individual case safety reports contribute to the description of trends and regional characteristics of AEFIs. 

But work is still needed to strengthen global vaccine safety monitoring, and to promote public confidence in national vaccine programs. 

MMWR: Progress in Immunization Safety Monitoring