Fig. 1

Number of outpatients per week during the pandemic. The black line illustrates outpatients from January 1 to May 3. The gray line illustrates outpatients during the same period in 2019. a Total outpatients; b nonlocal patients. The dotted line represents the holiday week of the Spring Festival. The red dotted line represents the date when the Shanghai Municipality Government announced their first-level response. The blue dotted line represents the date when the first-level response is downgraded to a second-level response