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Human infectious disease burdens decrease with urbanization but not with biodiversity.

Chelsea L Wood1,2, Alex McInturff3, Hillary S Young4

  • 1Department of Ecology and Evolutionary Biology and Michigan Society of Fellows, University of Michigan, Ann Arbor, MI 48104, USA chelwood@uw.edu.

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Summary
This summary is machine-generated.

Global infectious disease burdens are linked to ecological and economic factors. Increased wealth and urbanization correlate with lower disease impact, suggesting potential public health improvements.

Keywords:
Infectious diseasedilution effectdisability-adjusted life yearglobal change

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Area of Science:

  • Global Health
  • Epidemiology
  • Environmental Science

Background:

  • Infectious disease burdens fluctuate globally due to ecological and economic drivers.
  • Previous research estimated country-level morbidity and mortality, but this study uses disability-adjusted life years (DALYs) for comprehensive health impact comparison.
  • DALYs allow for a standardized measure across diseases with varying lethal and sublethal effects.

Purpose of the Study:

  • To investigate the spatial and temporal relationships between infectious disease DALYs and demographic, economic, environmental, and biotic drivers.
  • To understand how factors like biodiversity, temperature, urbanization, and wealth influence infectious disease burdens.
  • To identify key drivers that can inform strategies for improving global public health.

Main Methods:

  • Analysis of DALYs data for infectious diseases in 60 comparable countries.
  • Statistical investigation of relationships between DALYs and various drivers including temperature, biodiversity, urbanization, and wealth.
  • Examination of temporal trends from 1990 to 2010.

Main Results:

  • Driver associations with diseases were often disease-specific; temperature showed varied impacts.
  • Higher biodiversity correlated with higher disease burdens, challenging the dilution effect hypothesis.
  • Increased urbanization and wealth were linked to reduced disease burdens, likely due to improved sanitation and healthcare access.

Conclusions:

  • Urbanization and wealth are significant factors in reducing infectious disease burdens.
  • Findings suggest that investments in sanitation, healthcare, and potentially managing urbanization and economic development can mitigate infectious disease impacts.
  • Understanding these drivers is crucial for future global public health interventions and policy development.