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FIGURE 7.3 The sequence of calculations for comparing the potential health benefits of two vaccine candidates.

percent effective to the entire target population, at the time envisaged for immunization. The values for the possible reduction in morbidity and mortality take into account the vaccine’s predicted efficacy.

The annualized present value of the expected health benefits incorporates the probability of successful development and the time at which benefits would occur. Use of these values to compare health benefits from these vaccines is discussed in Chapter 9.

An Illustration of the Process

Figure 7.3 illustrates the sequence of calculations in the proposed method for comparing the health benefits expected from two vaccine candidates. Chapter 3 and the foregoing text describe the specific computations involved at each stage.

Costs

The vaccine expenditures associated with achieving each vaccine candidate’s benefits are shown in Table 7.3.



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