Fig. 5.

The impact of mitigation strategies on the spread of COVID-19 epidemic in Toronto on the Watts–Strogatz network. In this figure and the following figure, the dashed lines represent $95\text{\%}$ confidence intervals. In (A) and (B), the red, purple, and green lines represent that the transmission rates are unchanged, reduced by $20\text{\%}$, and reduced by $40\text{\%}$, respectively. In (C) and (D), the red, purple, and green lines represent the rate of quarantine, $q=0$, 1/8, and 1/4, respectively. In (E) and (F), the red, purple, and green, and light blue lines represent that the node degrees of symptomatically infected individuals are reduced by $0$, $1$, $2$, and $3$, respectively. (A) The number of newly infected individuals after reducing the transmission rates by personal protection and social distancing. (B) The cumulative number of infected individuals after reducing the transmission rates by personal protection and social distancing. (C) The number of newly infected individuals after close contacts are quarantined. (D) The cumulative number of infected individuals after close contacts are quarantined. (E) The number of newly infected individuals after the node degrees of symptomatically infected individuals are reduced. (F) The cumulative number of infected individuals after the node degrees of symptomatically infected individuals are reduced.