Bi-weekly influenza surveillance overview, 17 June 2011 - Weeks 21-23

The influenza season has come to an end in Europe with all countries reporting low intensity and only three countries reporting sporadic activity.For the fifth consecutive week, no influenza virus was detected from sentinel sources. Five influenza A and four influenza B viruses were detected in non-sentinel specimens over the three-week period.Five SARI cases were reported, one of which tested positive for influenza virus.