Table 2.

Example of the choice sets in the survey.

	Vaccination plan 1	Vaccination plan 2	Do not receive both plans
Brand	BioNTech/Fosun	AstraZeneca	None
Probability of COVID-19 infection (efficacy)	Reduce 90%	Reduce 70%	No reduction
Probability of serious adverse event (safety)	1 out of 10,000	1 out of 100,000	No serious adverse event
Vaccine uptake of people around	Family members received the vaccine	No known people received the vaccine	NA
Recommendations from professionals	Recommended by the expert advisory panel of the government	Recommended by the general physicians	NA
Venue for vaccination	Community center	Healthcare facilities	NA
Quarantine for vaccinated travelers	At least 14-day compulsory quarantine	The 14-day compulsory quarantine can be exempted	At least 14-day compulsory quarantine
Which vaccination plan would you like to choose?	Vaccination plan 1: □	Vaccination plan 2: □	Do not accept both: □