TABLE 1.

The attributes and levels of the discrete choice experiment study

Attribute	Levels
Effectiveness (%)	50
	70
	90
Duration of protection (month)	6
	12
	18
Adverse event	No reactions
	Local reactions such as redness and/or swelling at the site of vaccination for 1‐2 d
	Fever 1‐2 d
The total number of injections	1
	2
	3
Price (CNY)	0
	200
	400
	600
	800
	1000
Origin of product	Imported product
	Domestic product

Abbreviation: CNY, Chinese Yuan.