To Vaccinate or Not to Vaccinate-This Is the Question among Swiss University Students.

The speed and innovation of the COVID-19 vaccine development has been accompanied by insecurity and skepticism. Young adults' attitude to vaccination remains under investigation, although herd immunity cannot be reached without them. The HEalth in Students during the Corona pandemic study (HES-C) provided the opportunity to investigate vaccination intention in 1478 students in the sixth survey wave (January 2021), including vaccination intention, psychological antecedents of vaccine hesitancy, trust in government's vaccination strategy, and vaccination history. Associations with vaccination intention were analyzed with multivariate ordinal regression and predicted margins were calculated adjusting for gender, age, anxiety, health profession, and subjective health status. A third was decided (yes 25.1%, no 7.6%), and 68% were unsure about getting the COVID-19 vaccine when available. Next to demographic characteristics, vaccination history (influenza vaccination OR = 1.39; 95% CI: 1.06-1.83, travel vaccination OR = 1.29; 95% CI: 1.04-1.60), trust in vaccination strategy (OR = 2.40; 95% CI: 1.89-3.05), and 5C dimensions were associated with vaccination intention: confidence (OR = 2.52; 95% CI: 2.09-3.03), complacency (OR = 0.79; 95% CI: 0.66-0.96), calculation (OR = 0.79; 95% CI: 0.70-0.89), constraints (OR = 1.18; 95% CI: 0.99-1.41), and collective responsibility (OR = 4.47; 95% CI: 3.69-5.40). Addressing psychological antecedents and strengthening trust in official strategies through targeted campaigns and interventions may increase decisiveness and result in higher vaccination rates.