The Distribution of Infectious Diseases and Extrinsic Mortality Across Countries

Analysis of the spatial distribution and geographical determinants of human infectious agents across countries suggests that the total number of multi-host vector-transmitted diseases provides a useful measure of the mortality environment. Pathogens of this type are difficult to eradicate because they multiply in both humans and non-human hosts and are bound to specific climatological conditions. The count index of multi-host vector-transmitted diseases that are endemic in a country is a good proxy of life expectancy and of the likelihood of epidemics. This count is useful for cross-country empirical comparisons5 because it is not driven by demographic and economic conditions.