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Heterogeneous case definitions used for the surveillance of influenza in Europe.

Aguilera, J.F., Paget, W.J., Mosnier, A., Heijnen, M.L., Uphoff, H., Velden, J. van der. Heterogeneous case definitions used for the surveillance of influenza in Europe. European Journal of Epidemiology: 2003, 18(8), 751-754
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Review
We reviewed the case definitions used by 21 influenza sentinel-based surveillance networks in Western Europe.

Results
Two clinical syndromes were used with a wide range of case definitions that nevertheless shared common criteria. Although there is currently no international consensus, efforts are being undertaken to standardise influenza case definitions in Europe. (aut.ref.)