In Besançon , his academic publication subjects included : Farmer 's lung , the relationship between mold and asthma , unhealthy dwellings , cholera , echinococcosis ( a local parasitic disease ) . Following a move in 2008 to Marseille , his work focused on three subjects : His interest in cholera epidemics started in 1994 while working as a volunteer pediatrician in Goma , Zaire during an extensive cholera outbreak following the Rwandan genocide . He next encountered cholera while working with MDM in Grand Comorro in 1998 . There , he created a surveillance system that with rapid follow-up and simple interventions eventually brought the outbreak under control
Rwandan genocide
Rwandan genocide
Renaud Piarroux