Global Vaccine Safety

Evaluating Vaccine Safety Causality Assessment


Indian and Zimbabwean experts gathered in India from 24 to 30 April 2017 in order to apply the WHO revised methodology for causality assessment of Adverse Events Following Immunization (AEFI). A total of 250 anonymized cases of serious AEFI from both countries were evaluated. The workshop, organized by the International Clinical Epidemiology Network (INCLEN), will allow to assess the inter - and intra-country agreement in classification of cases and provide inputs for reviewing and revising the current methodology. An electronic AEFI causality assessment software developed by WHO was also evaluated. This study is being conducted under the oversight of the Global Advisory Committee on Vaccine Safety (GACVS) and the findings will be deliberated at the December 2017 GACVS meeting.