Table 2. The estimated coefficients of the model for the ILI data in Guangdong.

	Intercept	Cos (2πn/53)	Sin (2πn/53)	D =1	D =2
Parameter	–2.91	–0.23	0.17	0.05	–0.22
Exp ()*	0.05	0.79	1.19	1.05	0.80
P	<0.001	<0.001	<0.001	0.19	<0.001

^*exp (), function returns the exponential value.