SYRINGES EXCHANGE OR APPRENTICESHIP - THE BUSES IN BIENNE AND GENEVA

In Switzerland, the health ministry (Office Federal de la Sante Publiq ue) has systematically encouraged the evaluation of low threshold serv ices. In this article, we discuss the evaluation of two of these: the buses for syringes exchange in Geneva and Bienne, the implementation o f these two services, the success obtained and the contacts establishe d. Even if the design of such an evaluation was relatively complicated with one monitoring and two specific surveys, the principal aim of th is article is not to measure the efficacy as such but to show how an l earning process has occurred between the actors: government, administr ation, police, service's team, drug's users and neighbourhood's inhabi tants. The efficacy for a long period of lime and the implementation's success are largely linked to such learning processes.