Distrust in science and the spread of pseudoscientific theories appears to be one of the main factors threatening the freedom of science in modern Western democracies. This article discusses how due to the CoVid-19 pandemic this danger may even increase. In particular, the article highlights how certain behaviours of members of the scientific community may contribute to the spread of anti-scientific attitudes in society. The author analyses which strategies of action, especially within the scientific community, can be used to contrast such a tendency and points out that, regardless of the strategy chosen, the fight against pseudoscience requires a deep reflection on the problem of the “demarcation”, a key issue of the philosophy of science, which has been neglected in recent decades.