Table 6.

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

t	Recovered population R(t)				Error
	α = 0.7	α = 0.8	α = 0.9	α = 1
0	1311.09	647	232.73	66	0
50	1.66665 × 106	2.12307 × 106	2.63429 × 106	3.20032 × 106	1.86265 × 10−9
100	5.03577 × 106	6.50869 × 106	8.16997 × 106	1.00196 × 107	9.31323 × 10−9
150	8.07996 × 106	1.05078 × 107	1.32537 × 107	1.63177 × 107	1.49012 × 10−8
200	8.77051 × 106	1.14705 × 107	1.45318 × 107	1.79540 × 107	3.35276 × 10−8