Table 4.

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

t	Infected population I(t)				Absolute error
	α = 0.7	α = 0.8	α = 0.9	α = 1
0	7136.9	5030.55	2900.06	745	0
50	510,112	627,863	779,156	971,180	2.27708 × 10−7
100	2.53987 × 106	3.76779 × 106	5.40300 × 106	7.50897 × 106	9.53674 × 10−7
150	9.07833 × 106	1.38766 × 107	2.02139 × 107	2.83114 × 107	2.34693 × 10−6
200	2.31094 × 107	3.54094 × 107	5.15567 × 107	7.20841 × 107	4.57466 × 10−6