Table 1.

Model parameter values and source.

Parameter	Description	Value	Reference
Π	Recruitment rate of individuals into the population	$\frac{10000}{59\times 365}$	[26, 38]
p	Proportion of recruited individuals who are vaccinated	0.0001	Assumed
v	Vaccination rate	0.4	Assumed
ω A	Reduction in the transmission from asymptomatic	0.3	[39]
ω I	Increase in the transmission from symptomatic	1.8	Assumed
ω H	Reduction in the transmission from hospitalized	0.3	Assumed
μ	Natural death rate	$\frac{1}{59\times 365}$	[26, 38]
δ	Disease-induced death rate	0.018	[40, 41]
ε	Infection reduction of vaccinated individuals	0.8	Assumed
σ	Exit rate from the exposed class	0.13	[9]
γ	Exit rate from the infectious class	0.0833	[41]
κ	Proportion of infectious who recover naturally	0.05	[42]
ψ	Fraction of exposed who become infected	0.7	[39]
b	Effective contact rate	1.12	[41]
τ	Recovery rate of hospitalized individuals	0.0701	[40]
ϕ	Proportion of asymptomatic who recover naturally	0.14	[9]
λ	Exit rate from the asymptomatic class	0.13978	[39, 41]
η	Rate at which individuals lose immunity	0.011	[19]