Bi-weekly influenza surveillance overview, 22 Aug-4 Sept 2011 - Weeks 34-35

During weeks 34–35/2011, 16 of 17 reporting countries experienced low intensity of influenza activity.
Sentinel specimens yielded no influenza virus detections while four type A and three type B influenza viruses were detected in non-sentinel specimens. One type A influenza virus was subtyped as A(H3).
During weeks 34–35/2011, two cases of SARI were reported.