Inclusion Criteria:  COVID-19-vaccine hesitant person. A vaccine hesitant person is defined as somebody who does not oppose the vaccine but rather is uncertain whether to have or not to have the vaccine and has not made a terminated choice yet. Not yet vaccinated against COVID-19 Age ≥ 18 years.  Exclusion Criteria:  General opposition to COVID-19 vaccination. Already vaccinated Clear intention to get the vaccine in the sooner future (iv) Age < 18 years.