Fig. 3

Evaluation of the intervention effect on the tendency of PTB incidence with both the strict and regular interventional models. Time series of PTB monthly incidence from January 2020 to December 2021. The brown line indicates the observed incidence under the strict state of COVID-19 epidemic prevention and control. The blue line represents the observed incidence under the regular state of COVID-19 epidemic prevention and control. The black line denotes the incidence data from May 2020 to December 2021 as predicted from the intervention model under strict intervention. The brown line denotes the incidence data from January 2021 to December 2021 as predicted from the intervention model under regular intervention