Semantic network represents a set of concepts or nodes connected by edges, which in turn represent the connections between those concepts. The concepts are usually composed of one central and a variety of peripheral concepts. The aim of this study was to examine the relationship between beliefs about the danger of COVID-19 and beliefs about health care system, vaccine, scientists and political system. In addition, the associations between personality traits and these categories of beliefs were examined. A sample of 103 participants aged between 19 to 34 years filled in an online survey. The results showed a positive relationship between beliefs about the danger of COVID-19 and beliefs about vaccine, scientists and political system, but significant association with beliefs about health care system was not found. Participants rated the highest the association between beliefs about scientists and vaccine, followed by beliefs about the danger of COVID-19 and scientists and between beliefs about health care and political systems. A comparison of the obtained correlations between beliefs and the participants’ assessment of the connection between the beliefs indicated their high agreement. The basic dimensions of personality were not significantly associated with beliefs. This study provides a basis for understanding the individuals’ perception of the connection between their own beliefs.