Professor at EPFL and affiliated to C4DT, Carmela Troncoso, 37, is in charge of the IT component of the tracing system that Switzerland is preparing. The launch, expected on 11 May, has been delayed by debates at the legislative level. In the meantime, an exclusive meeting with a researcher concerned about health and privacy. For more information please read the article ¬†which appeard in L’Illustr√© magazine.