The international limits and population at risk of Plasmodium vivax transmission in 2009
A research priority for <em>Plasmodium vivax</em> malaria is to improve our understanding of the spatial distribution of risk and its relationship with the burden of <em>P. vivax</em> disease in human populations. The aim of the research outlined in this article is to provide a contemporary evidence-based map of the global spatial extent of <em>P.