Fig. 3: Estimates of the COVID-19 outbreak under various scenarios of intervention timing and lifting of travel restrictions across China.
From: Effect of non-pharmaceutical interventions to contain COVID-19 in China
a, Estimated epidemic curves for interventions implemented earlier than their actual timing. b, Estimated epidemic curves for interventions implemented later than their actual timing. c, Estimated spread of COVID-19 for different rates of population contact after the lifting of intercity travel restrictions. The orange vertical lines indicate the date on which the lockdown of Wuhan began (23 January 2020), and the green line shows the date on which travel restrictions were lifted (17 February 2020).
