Research published especially in the last decade indicates the influence of anxiety on the human decision-making process. This study analyzes the anxiety among individuals who decided to undergo vaccinations for COVID-19. The study assesses that the level of education, especially medical education, age, and gender, had an influence on the level of anxiety in terms of vaccination situations. The STAI self-assessment questionnaire was used. The study was conducted anonymously using the paper-pencil method during two rounds of vaccination; therefore, the respondent sample included mainly medical personnel and elderly people. A total of 898 questionnaires were issued. Age did not affect the trait and state of anxiety, but highly educated people tested during vaccination had a lower anxiety level. Gender had no influence on the trait but did influence the state of anxiety. Overall, women were the group that exhibited a higher level of anxiety than men. Nurses were particularly vulnerable to the negative effects of situational medication in this group.