The COVID-19 pandemic has caused unprecedented changes in educational, professional, and leisure activities around the world. Protecting health against the virus has become the most important task in the social and individual dimension. The aim of the study was to diagnose changes in the behaviour and health beliefs of students. The WHO definition of health and the Health Belief Model (HBM) were adopted as the theoretical basis for defining variables. The study was of diagnostic and verification nature, and a quantitative strategy was used in it. The general population comprised students of Nicolaus Copernicus University in Torun. The study was conducted electronically in 2020, during the first lockdown in Poland. The Likert scale was used as a tool to assess the degree of change. The respondents declared the greatest changes in terms of caring about physical and relational health. The declared behavioural changes concerned the most conservative, trained forms of pro-health activity. Despite the declared beliefs about the importance of maintaining health and the personal risk of viral infection, the respondents declared undertaking more advanced pro-health activities only to a small extent
