In 1997, FluNet, a global web-based tool for influenza virological surveillance was launched. It is a critical tool for tracking the movement of flu viruses globally. Country data is updated weekly and is publically available.

The virological data entered into FluNet, e.g. number of influenza viruses detected by subtype, are critical for tracking the movement of viruses globally and interpreting the epidemiological data. The data at country level are publically available and updated weekly. The results are presented in various formats including tables, maps and graphs.