Type of Document Master's Thesis Author Manangan, Arie Ponce Author's Email Address amanangan1@cdc.gov URN etd-06142006-103922 Title Influenza Prevalence in the US Associated with Climatic Factors, Analyzed at Multiple Spatial and Temporal Scales. Degree Master of Arts Department Anthropology and Geography Advisory Committee
Advisor Name Title Paul Knapp Committee Co-Chair Susan Walcott Committee Co-Chair John Allensworth Committee Member Keywords
- Morbidity
- Weather
- Climate
- ENSO
- Precipitation
- Mortality
- Influenza
Date of Defense 2006-04-20 Availability unrestricted Abstract Linkages between influenza prevalence and climate (e.g. precipitation, temperatures, ElNino Southern Oscillation ENSO) have been suspected, but definitive evidence remains elusive.
This analysis investigated a climatic relationship between influenza mortality (measured by
multiple caused pneumonia and influenza deaths) and influenza morbidity (measured by isolates
tested for influenza). Influenza-climate linkages were analyzed at multiple spatial scales (e.g.
local analysis, and regional analysis) and multiple temporal scales (e.g. annualized mortality
counts, and mortality counts based on cumulative percentiles). Influenza mortality and
morbidity were found to have significant correlations to seasonal temperatures, precipitation, and
ENSO. Influenza-climate associations varied spatially and temporally, and underscore the
importance of considering geographic scale in investigative analyses of disease. Evidence for an
influenza-climate relationship provides a greater understanding of the enviro-climatic factors that
can contribute to an influenza epidemic, and provides an impetus for further studies that
incorporate climatic factors in influenza risk modeling.
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