Table 3.

Numerical results of exposed population $E(t)$ for fractional parameter $\tau =0.7,0.8,0.9,1$ and comparison between classical and approximate solution

t	Exposed population E(t)				Absolute error
	α = 0.7	α = 0.8	α = 0.9	α = 1
0	1.74512 × 106	1.73824 × 106	1.73129 × 106	1.72427 × 106	2.32831 × 10−10
50	1.19043 × 107	1.61123 × 107	2.14275 × 107	2.79884 × 107	1.86265 × 10−8
100	7.59901 × 107	1.10997 × 107	1.55765 × 108	2.11508 × 108	2.08616 × 10−7
150	2.51400 × 108	3.72009 × 108	5.26368 × 108	7.19307 × 108	8.34465 × 10−7
200	5.95356 × 108	8.84518 × 108	1.25536 × 109	1.71808 × 109	2.14577 × 10−6