Setting up a specific surveillance system of community health during mass gatherings.

During mass gatherings such as those that occur during international fairs or sporting events, there are no recognised standards for providing health surveillance of the general community (in contrast with the participant community). Data must be collected continuously as produced, so as to provide immediate information and permit prompt detection of epidemics. To monitor the eVects of the 1998 World Football Cup (WFC) on the health of the general population of the host country, we set up a nationwide automated sentinel disease surveillance system. Its results have been published in detail elsewhere. We describe here the implementation of the general practitioners’ (GPs) sentinel system required by this surveillance system.