English: This image was obtained from www.map.ox.ac.uk

This map shows estimated levels of Plasmodium vivax malaria endemicity within the limits of stable transmission.

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.

Estimates are made based on data from parasite rate surveys which feed into a geostatistical model that produces a a range of predicted endemicities for each location (a probability distribution). The model also uses data from environmental covariates which help predict more accurately, especially in areas far from any actual survey data. The environmental covariates include rainfall, temperature, land cover and urban/ rural status. The model incorporated data on Duffy negativity in human populations, particularly in Africa, and we also provide a separate map of the predicted frequency of Duffy negativity. The endemicity map displayed shows the mean value for the probability distribution at each location (approx. 5km2).