Weekly influenza update, week 13, March/April 2017

Influenza activity across the region decreased further with 38 of 39 countries reporting low influenza activity. The proportion of sentinel specimens testing positive for influenza viruses was 13%, slightly lower compared to the previous week (15%). The proportion of type B viruses exceeded the proportion of type A viruses in sentinel detections, similar to recent weeks. However, the overall number of type B virus detections remained low.