“…Since the number of incidence after the jump at 2001 yr is not decreasing, we apply OC theory to our model for proposing optimal treatment strategies of TB in South Korea. OC theory has been applied in many areas including economics (Dorfman, 1969;Kamien and Schwartz, 1992;Weber, 2005), engineering , biology (Fister et al, 1998;Joshi, 2003;Jung et al, 2002Jung et al, , 2009Kirschner et al, 1997;Lenhart and Workman, 2007) and medicine (Jung et al, , 2006(Jung et al, , 2008Lenhart et al, 2005). In our work, the control plans are associated with three control mechanisms: distancing, case finding and case holding efforts.…”