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. 2021 Sep 23;9(10):1062. doi: 10.3390/vaccines9101062

Figure 2.

Figure 2

Cost-effectiveness analysis by using a decision tree model. Total cost of three polio immunization schedules in 2016 was used as the cost, and the sum of LY of local resident births in 2016 was used as the effectiveness. The four-tOPV immunization schedule was cost-effective; in contrast, both the two-IPV-two-bOPV schedule and the four-IPV schedule were cost-ineffective. bOPV, bivalent live attenuated oral polio vaccine; tOPV, trivalent live attenuated oral polio vaccine; IPV, inactivated polio vaccine; LY, life year.