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Weekly influenza surveillance overview, 20 May 2011 - Week 19

Surveillance report
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During week 19/2011, influenza activity was at its lowest level since the peak of the season in week 52/2010. For the first time, no influenza virus has been detected from sentinel sources. Six influenza A and six influenza B viruses have been detected in non-sentinel specimens.

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110520_SUR_Weekly_Influenza_Surveillance_Overview pdf.pdf - EN - [PDF-1010.49 KB]

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