Through an integrative new approach with scientific, methodological and technical issues, consortium S2E will open by the deep analysis of Health Environment relationships a new field for early warning operational systems able to alert and predict the geographical extension of epidemics.

The integrative approach consists in three main objectives:

• Deployment of ground Health Information Systems (epidemiological networks) for data early waring, information transfer and management in real time.
• Use of bio-mathematical modelling of epidemic phenomena dynamics ( quantitative approach of risk), which integrates transportation processes, pathogens, vectors, hosts and physical & socio-ecological environment.
• Remote sensing approach (environmental approach), which measures epidemics cofactors as vegetation, hydrology, forest, coverage, meteorology, population .

The first ground based survey entitled the EMERCASE programme started in July 2000 in the Senegal River Valley. The Rift Valley Fever surveillance network associates local research team and public health services as well as local administrations in charge of environment management of Senegal & Mauritania