The mapped variable is the age-standardised P. vivax Parasite Rate (PvPR0-99) which describes the estimated proportion of the general population that are infected with P. vivax at any one time, averaged over the 12 months of 2010. The map also displays the limits of unstable P. vivax malaria transmission (in dark grey) and the areas where both transmission is unstable and the proportion of the human population who are Duffy negative is greater than 90% (hashed area)...