Figure 2From: Caputo SIR model for COVID-19 under optimized fractional order(a) Best data fitting for COVID-19 daily cases (black circles) in Pakistan from 1 April to 15 May 2020 with the infectious class \(I(t)\) (solid blue line) of the model under the Caputo operator (\(\nu = 8.561591\text{e-}01\)) and the (b) respective residualsBack to article page