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Table 4 Expected cost-effectiveness of vaccination strategies

From: Cost-effectiveness analysis of typhoid conjugate vaccines in an outbreak setting: a modeling study

Strategy

Expected net costs per 100,000 people in 2020 USD

Expected total DALYs per 100,000 people

Expected incremental costs per 100,000 people versus next best non-dominated alternative

Expected DALYs averted per 100,000 people versus next best non-dominated alternative

ICER versus next best non-dominated alternative ($ per DALY averted)

Scenario 1: When an outbreak occurs over the 10-year time horizon

Reactive vaccination (routine + campaign)

$111,213

383

No vaccination (base case)

$128,360

689

Dominated

Preventative vaccination (routine + campaign)

$131,749

316

$20,536

67

307

Preventative vaccination (routine only)

$154,148

472

Dominated

Scenario 2: When no outbreak occurs (pre-outbreak incidence)

No vaccination (base case)

$5893

35

Preventive vaccination (routine only)

$26,704

22

Dominated

Preventative vaccination (routine + campaign)

$27,109

11

$21,216

24

902

Scenario 3: When an outbreak has already occurred (post-outbreak incidence)

No vaccination (base case)

$7242

577

Preventive vaccination (routine + campaign)

$49,406

295

$42,164

282

150

Preventative vaccination (routine only)

$51,717

372

Dominated

  1. Expected total net costs, total disability-adjusted life-years (DALYs), incremental costs, DALYs averted, and incremental cost-effectiveness ratios (ICERs) per 100,000 people are shown for each strategy over the 10-year time horizon when (1) an outbreak occurs over the 10-year time horizon (randomized timing; Scenario 1), (2) an outbreak does not occur (i.e. assuming the pre-outbreak incidence; Scenario 2), and (3) an outbreak has already occurred and another one is unlikely (i.e. assuming the post-outbreak incidence; Scenario 3). Strategies are sorted from lowest to highest expected total costs per 100,000 individuals. All costs and DALYs are discounted at a rate of 3% per year. Dominated strategies do not form part of the cost-effectiveness frontier, i.e. no WTP value exists for which a dominated strategy is preferred in terms of cost-effectiveness