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Influenza surveillance in Norway

Influenza surveillance in Norway. Dr. Hans Blystad (hans.blystad@fhi.no) Norwegian Institute of Public Health. November 2005. Influenza surveillance Norway. From 1975 to 1998 aggregated data (no of cases) were collected weekly from all doctors

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Influenza surveillance in Norway

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  1. Influenza surveillance in Norway Dr. Hans Blystad (hans.blystad@fhi.no) Norwegian Institute of Public Health November 2005

  2. Influenza surveillance Norway • From 1975 to 1998 aggregated data (no of cases) were collected weekly from all doctors • Since 1999 a sentinel surveillance system introduced with 201 selected reporting units from all parts of Norway. Reporting weekly from week 40 till week 20 the following year • Voluntary reporting system from laboratories on diagnosed influenzavirus

  3. 7 Influenza reporting units i Norway (n=201) 9 1 11 8 11 11 8 9 9 17 14 10 16 9 14 11 7 10 9

  4. Data collected in the influenza season by 201 reporting units (by age group): • no. of cases of influenzalike illness per week • no. of total patients treated per week • total number of patients on the doctor`s list

  5. Influenza surveillance Norway – weekly reporting in the influenza season

  6. Reported data influenza season 1999-2005 week

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