An assessment of the value of Haemophilus influenzae type b conjugate vaccine in Asia

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Abstract
Haemophilus influenzae type b (Hib) is a leading cause of bacterial meningitis and pneumonia. Although invasive Hib disease has been reduced substantially wherever Hib conjugate vaccines have been introduced into routine childhood immunization schedules, these vaccines are more costly compared with the vaccines routinely used in the Expanded Program for Immunization. Consequently a model was constructed to compare the expected burden of Hib disease with and without a national vaccine program for various Asian countries. Cost of the vaccine program, expected benefits of reduced deaths and savings from prevented disease treatment were assessed for each country based on the model assumptions. Model outcomes were expressed as a net cost, cost per death prevented and cost per disability-adjusted life year for each country and economic stratum. With the assumption of a disease burden of meningitis and pneumonia comparable with that observed in other regions, the model predicts that 668 000 cases of Hib pneumonia and 136 000 cases of Hib meningitis would occur annually in this cohort resulting in 156 000 deaths. Based on current vaccination coverage rates for the individual countries, the model predicted that ∼136 000 (87%) Hib deaths could be prevented annually with incorporation of Hib vaccine into the Expanded Program for Immunization. For each of the countries considered, routine vaccination with Hib would cost between 0.1 and 3.0% of per capita gross national product per child

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