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1.  Severe acute respiratory infections during the influenza A(H1N1)2009 pandemic in Belgium: first experience of hospital-based flu surveillance 
Archives of Public Health  2010;68(3):87-93.
Introduction
In September 2009, as part of the surveillance during the Influenza A(2009) pandemic, Bel-gium introduced a web-based surveillance system aimed at recording hospitalisations and deaths attributable to Influenza in real time.
Methods
We present the web-based application developed for the pandemic as well as a descriptive analysis of Severe Acute Respiratory Infection (SARI) cases reported through this system.
Results
From 1 September to 31 December 2009, 1723 SARI-related hospitalisations potentially due to influenza were reported in Belgium. The median age of the patients was 29 years (range: < 1 year-99 years). Among SARI-hospitalised patients 68% were aged less than 45 years, 10.6% were vaccinated with the seasonal influenza vaccine and 7.5% with the pandemic influenza vaccine. No deaths were recorded.
Conclusions
This first experience showed the feasibility of getting real-time information from hospitals during a public health crisis. However, the absence of death detected through the system highlighted the importance of better defining the severity of the hospital cases.
doi:10.1186/0778-7367-68-3-87
PMCID: PMC3463031
SARI; hospitalisation; surveillance; influenza A(H1N1)2009; epidemiology
2.  Influenza A(H1N1)2009 pandemic chronology of the events in Belgium 
Archives of Public Health  2010;68(2):48-52.
doi:10.1186/0778-7367-68-2-48
PMCID: PMC3463025
Belgium; chronology; epidemiology; influenza A virus H1N1 subtype; pandemic

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