Surveillance of Influenza in Northern Ireland 2016-17

The attached document details the surveillance of influenza in Northern Ireland in 2016/17 influenza season.

Overall, the 2016/17 influenza season was characterised by low levels of influenza activity in both the community and hospital setting.

This season, influenza A (H3) was the predominant circulating strain (61%), followed by a substantial proportion of influenza B (23%) later in the season. The remaining cases were identified as influenza A (untyped) (16%), with a very small number of influenza A (H1N1) pdm09 cases also detected (<1%).