Global influenza surveillance systems

World Health Organization (WHO) - FluNet
FluNet is the web-based data collection and reporting tool of the Global Influenza Surveillance Network (GISN). FluNet includes virological influenza information from countries worldwide, provided by National Influenza Centres (NICs) and other national influenza reference laboratories collaborating actively with GISN.

World Health Organisation (WHO) - Global Influenza Surveillance and Response System
The WHO Global Influenza Surveillance and Response System monitors the influenza virus evolution, recommends influenza vaccine composition, and serves as alert mechanism for influenza viruses with pandemic potential.

World Health Organisation (WHO) - Influenza updates

Canada: Public Health Agency of Canada (PHAC)  - FluWatch 
FluWatch is Canada's national surveillance system that monitors the spread of flu and flu-like illnesses on an on-going basis. FluWatch reports, posted every Friday, contain specific information for health professionals on flu viruses circulating in Canada.

US: Centers for Disease Control and Prevention (CDC) – FluView
A weekly Influenza Surveillance Report Prepared by the Influenza Division.

Situation Update: Summary of Weekly FluView Report

Australia: Australian Government Department of Health – Australian Influenza Surveillance Report and Activity Updates

The Australian Influenza Report is compiled from a number of data sources, including laboratory-confirmed notifications to NNDSS, sentinel influenza-like illness reporting from General Practitioners and Emergency Departments, workplace absenteeism, and laboratory testing.

New Zealand: Information for New Zealand Public Health Action, Public Health Surveillance - Influenza Weekly Update
The national influenza surveillance system in New Zealand is an essential public health component for assessing and implementing strategies to control influenza. The Influenza Weekly Updates summarise the data collected from sentinel general practive (GP) surveillance and non-sentinel surveillance.

South Africa: National Institute for Communicable Diseases - Consolidated Influenza Surveillance Weekly Report

Chile: Ministerio de Salud Chile - Department de Epidemiologia

Japan: National Institute of Infectious Diseases (NIID)