Table 2.

Parameters of model (2.1).

Para	Value	Unit	Interpretation	Source
b	1.64 × 107	Year−1	human recruitment rate	[23]
d	0.006988	Year−1	human natural mortality rate	[23]
μ	$\frac{365}{5}$	Year−1	human natural recovery rate	[7]
δ	0.33042	Year−1	human loss rate of immunity	fitting
k	2.8668 × 10−8	None	the infection rate	fitting
α	4.9077 × 10−6	None	measures the psychological or inhibitory effect	fitting
β	78.12	None	none	fitting