Figure 2From: Modeling and analysis of the secondary routine dose against measles in China Numerical simulations of system ( 4 ) showing S , I vs time t . (a) \(\eta_{2}=\eta_{2}^{\prime}=0.3\), \(\Re_{0}= 6.8702>1\); (b) \(\eta_{2}=\eta_{2}^{\prime}=0.99\), \(\Re_{0}= 0.9601<1\).Back to article page