Figure 4. Observed seroprevalence in 2009 (left) and difference between observed and predicted seroprevalence in 2009, in the studied villages.

Villages with predicted seroprevalence higher than observed seroprevalence (red cross) were aggregated in the middle of the area where most rice fields are close to several villages. Villages with predicted seroprevalence lower than observed seroprevalence (pink star) were less aggregated. For most villages the differences between predicted and observed seroprevalence were low (triangle).