Predictive Surveillance Model. Black arrow – timeline for a hypothetical vector borne, zoonotic disease outbreak. The outbreak progresses from left to right. Green bars – natural events in an outbreak’s emergence. Blue bars – the predictive surveillance program activities. Red bars –predictive surveillance program products. The blue and red bars together represent surveillance efforts that detect and follow the progression of the outbreak’s emergence over time. The sequence over time of the green, blue and red bars is set in the model’s configuration, but the spacing between bars varies, according to the outbreak’s pathogen etiology and location.