We experimented alternative marketing and took the H1N1 flu as an opportunity. We went in a market, a place where people know each other and we hang the poster with the slogan « to betray is to save » and gave flyers that encouraged people to contact us to denounce anyone with a slight symptom. The aim was to open a discussion with people and help them realize that the overdose of advise around H1N1 was ridiculous. This project has been completed by Simon Gréau, Maelle Christien, Romain Durand and I