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Published 18 November 2008, doi:10.1136/bmj.a2545
Cite this as: BMJ 2008;337:a2545
Probably has important benefits, despite recent doubts about its effectiveness
| The first 150 words of the full text of this article appear below. |
The annual influenza campaign is one of the United Kingdoms most successfully implemented public health programmes—uptake in those over 70 is estimated at 78%, the highest in Europe.1 The rationale for the programme is based on the knowledge that the vaccine is effective and cost effective. Although age related deterioration of immune function makes vaccines less effective in older people than in younger ones, the one available good quality randomised controlled trial shows good overall vaccine efficacy for serologically confirmed influenza (58%, 95% confidence interval 26% to 77%) and clinical influenza (47%, 27% to 61%) in those over 60.2
Large observational studies from the United States have also provided evidence for benefits against less influenza specific outcomes. These studies found that in the over 65s the vaccine reduces hospital admissions for pneumonia and influenza by 27% and all cause mortality by 48%.3 However, in the past few years, some researchers
Rachel E Jordan, lecturer and National Institute for Health Research postdoctoral fellow1, Jeremy I Hawker, head of public health development2
1 Unit of Public Health, Epidemiology and Biostatistics, University of Birmingham, Birmingham B15 2TT, 2 Health Protection Agency, Birmingham B3 2PW
r.e.jordan@bham.ac.uk
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