Analytic insights into the population level impact of imperfect prophylactic HIV vaccines. Academic Article uri icon

Overview

abstract

  • The population level implications of imperfect HIV vaccines were studied using a mathematical model. A criterion for determining the utility of a vaccine at the population level is introduced, and 2 useful summary measures, namely, vaccine utility (phi) and vaccine infection fitness (psi), are derived and shown to characterize the population-level utility once vaccine efficacies are determined. The utility of the vaccine alone does not guarantee a substantial impact, however, because the effectiveness of partially effective vaccines also depends on the prevailing level of HIV infectious spread. Therefore, a second criterion is introduced through a third summary measure, the hazard index (xi), to describe the effectiveness of a vaccine in substantially reducing HIV incidence. The qualitative features of the impact are delineated by studying 4 distinct scenarios of HIV vaccination. Accordingly, our work delineates the link between vaccine efficacies and the impact of vaccination at the population level and provides the tools for vaccine developers to assess the utility and effectiveness of a given imperfect vaccine straightforwardly and rapidly.

publication date

  • August 1, 2007

Research

keywords

  • AIDS Vaccines
  • HIV Infections
  • HIV-1
  • Models, Biological
  • Public Health
  • Vaccination

Identity

Scopus Document Identifier

  • 34447305777

Digital Object Identifier (DOI)

  • 10.1097/QAI.0b013e3180959a94

PubMed ID

  • 17554215

Additional Document Info

volume

  • 45

issue

  • 4