Figure 1From: Global dynamics of an SEIR epidemic model with discontinuous treatment Time series plot of the infective population in symptomatic phase ( I ) for \(\pmb{\mathcal{R}_{0}=6.6116>1}\) . The top two figures are the solution curves in the green box of the bottom figure. When the solution curves approach \(I_{0}=30\), there appear many oscillations.Back to article page