Table 1.

Model parameters.

Item	Parameter	Value	Lower*	Upper*	Distribution	Data source
Vaccination cost per dose (USD)	Acquisition	4.00	4	5.5	Gamma	WHO (12)
	Cold-chain freight	0.24	/	/		Chen et al. (13)
	Refrigerator storage	0.18	/	/		Jiang et al. (10)
	Administration	1.55	/	/		National medical insurance bureau (14)
Direct medical cost (USD)	Infection/Non-severe	868.51	613.58	1,788.03	Dirichlet	Jin et al. (4); Zhao et al. (11)
	Hospitalization/Severe	8,210.73	5,800.74	16,905.10	Dirichlet
	ICU/Critical/death	23,467.82	16,710.96	48,700.88	Dirichlet
Percentage of each status	Infection	81.50%	60%	90%	Beta	Jin et al. (4); Zhao et al. (11)
	Hospitalization	13.80%	10%	20%	Beta
	ICU /death	4.70%	1%	10%	Beta
Work time loss/day	Infection	37	/	/		Jin et al. (4); Zhao et al. (11)
	Hospitalization	41	/	/
	ICU	42	/	/
	Death	44	/	/
Average salary per day (USD)		42.18	31.79	75.36	Gamma	National bureau of statistics (15)
Labor force participation	Aged 18–60	60.90%	/	/		The seventh national population census (37)
Nature rate	Infection rate	0.10430	/	/		Calculated
	Mortality rate	0.00164	/	/		Calculated
Vaccine effectiveness of adult (%)	Against infection	65.18%	62.62	67.75	Beta	Meta-analysis
	Against hospitalization	79.10	71.69	86.51	Beta	Meta-analysis
	Against ICU admission	90.46%	89.42	91.50	Beta	Meta-analysis
	Against death	86.69%	85.68	87.70	Beta	Meta-analysis
Vaccine effectiveness of elderly (%)	Against infection	66.52	28.30	100.00	Beta	Meta-analysis
	Against hospitalization	50.58	42.70	58.45	Beta	Meta-analysis
	Against death	82.42	81.53	83.31	Beta	Meta-analysis
Vaccine efficacy (%)	Against infection	70.56	57.87	83.24	Beta	Meta-analysis
	Against hospitalization	100.00	61.72	100.00	Beta	Meta-analysis
No. of population	Vaccinated with two doses (million)	1,256.86	/	/		State council (7)
Threshold (USD)	GDP per capital	12556.37	/	/		National bureau of statistics (15)

^*Upper and lower bound are obtained from published literature and meta-analysis.