Fig. 6From: Risk estimation and prediction of the transmission of coronavirus disease-2019 (COVID-19) in the mainland of China excluding Hubei provinceComparison of scenarios with different contact rates. The abscissa axis is the time. The blue solid line is the case with no changes (q1=exp(−δT(t))); The purple dash line is the case with q1=0.2; The red dash-dot line is the case with q1=0.5. a–b Adjust the contact rate from 5 March 2020; c–d Adjust the contact rate from 20 March 2020Back to article page