Hazard strategy starting 2002. Risk of infection or removal over time (1990–2030) when there is sufficient budget to allow control of up to 50 km2/y starting in 2002 [preferentially treating sites from the detected list in areas in which there is predicted to be high local rates of spread due to high hazard (equivalent to high basic reproductive number); optimized control radius 312.5 m; compare Fig. 5A].