Active surveillance for adverse events following immunization
Authors:
- Hazel ClothierHazel Clothier
- Kate HodgsonKHKate Hodgson
- Gowri SelvarajGSGowri Selvaraj
- Mee Lee EastonMEMee Lee Easton
- Jim P ButteryJBJim P Buttery
- 18 December 2013
- journal article
- review article
- Published by Taylor & Francis in Expert Review of Vaccines
- Vol. 13 (2) , 265-276
Abstract
Comprehensive surveillance of adverse events following immunization (AEFI) is required to detect potential serious adverse events that may not be identified in prelicensure vaccine trials. Surveillance systems have traditionally been passive, relying upon spontaneous reporting, but increasingly active surveillance and supplemental strategies are being incorporated into vaccine safety programs. These include active screening for targeted conditions of interest (e.g., hospitalization), monitoring of new data sources and real-time methodologies to detect changes in vaccine safety data in these sources. The role of improved causality assessment in AEFI surveillance is discussed, with its important role in determining whether a temporal association may have occurred by chance alone. Strong local vaccine safety networks are required to support national immunization programs, with recent progress in developing a framework for low- and middle-income countries. Global collaboration is increasingly required to address challenges in active AEFI surveillance, particularly for rare serious adverse events.Keywords
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