 This network, created in November 1984 by Professor Alain-Jacques Valleron, is regulated under the auspices of the mixed research unit U1136 of Inserm and Sorbonne University.This national system of clinical surveillance collects real-time epidemiological data, originating from the participating general practitioners, to be used in analysis, forecasting and redistribution.It is also a part of the surveillance warning system directed by French national agency of public health (Santé publique France) (receiving the CNIL’s favorable recommendation n°471 393).