National Influenza Centres (NICs): These are laboratories designated by national health authorities to monitor influenza activity within their respective countries. WHO Collaborating Centres (CCs): These centres provide advanced laboratory support and conduct specialized research on influenza viruses. Influenza Vaccine Strain Selection: GISRS data is used biannually to select the strains of influenza to be included in the seasonal vaccine. FluNet: A global web-based tool for sharing influenza surveillance data.
