Effectiveness and Harms of Seasonal and Pandemic Influenza Vaccines in Children Adults and Elderly
Manzoli, L., Ioannidis, J., Flacco, M., et al.
(2012).
Effectiveness and Harms of Seasonal and Pandemic Influenza Vaccines in Children, Adults and Elderly.
Human Vaccines and Immunotherapeutics. 8(7):851-862.
The authors completed an umbrella review and reanalyzed data from 15 previously published meta-analyses to determine how different analyses and study selection criteria could explain differences in findings or interpretations. They found statistically significant efficacy and effectiveness – high for laboratory-confirmed cases in children and adults and modest for clinically-confirmed cases and for the elderly – of seasonal influenza vaccines. They identified a scarcity of data on the efficacy of live-attenuated vaccine in those less than two years old, suboptimal quality of harms data, and a lack of meta-analysis on the effect of H1N1 vaccination on clinical outcomes.
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