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Knockout analysis in the four study areas: A Wuhan City, B Jilin Province, C Xiamen City, and D Chuxiong Prefecture. The subscripts refer to the occupation of the students (1 subscript) or non-students (2 subscript). The initial state is denoted as the default. The performance of the knockout for each of the transmission pathway was determined by setting the beta value to zero. For example, kb11 stands for getting rid of the student-to-students’ transmission pathway
