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Simulation results for the number of confirmed COVID-19 cases with different lockdown dates in Wuhan city. a, b The cumulative and newly cases with reliable medical resources and the strict community control strategy. c, d The cumulative and newly cases without reliable medical resources and the strict community control strategy. The orange, red, green, black, blue lines indicate that the Wuhan lockdown dates are January 19, January 21, January 23, January 25, January 27, respectively
