Drawing on two multiwave quantitative surveys realized among representative samples of the Belgian populations between March 2020 and November 2020 (N=2977;2565;2162) & N=1014;1016) and on 30 qualitative interviews realized with Belgians who openly distrust legacy media and believe in constipations theories about the Covid-19 pandemics, this paper will analyze the way in which French-speaking Belgians informed themselves throughout the first year of the COVID-19 crisis and their assessment of the role of traditional media in the fight against the epidemic. Different variables were questioned within the quantitative surveys (level of confidence in the different sources of information, frequency of consultation of traditional media and social media, adherence to pandemic control measures and vaccination, belief in conspiracy theories, level of anxiety) making it possible to identify four different informational vulnerability profiles (Kleis Nielsen et al.2020). The quantitative multi-wave analysis also revealed a significant increase in mistrust of the traditional news media growing through the pandemic. This mistrust was also illustrated in Belgium by a controversy on the complacency of the media towards political and economic power launched by the diffusion of a critical documentary which had a very important diffusion in Belgium on different social media (more than 1 million views out of 4 million inhabitants). The results of the qualitative survey will allow us to develop a comprehensive analysis of this phenomenon of mistrust towards traditional media. It will also allow us to critically asses how the role of information legacy media in society has evolve at a time when the circulation of information in society has been profoundly modified by the massification of the use of social networks.