Eradicating a disease Why is it so hard? There are obvious technical challenges Hard to find and eliminate disease in all non-human reservoirs Hard to access remote,undeveloped regions where the last cases of a disease reside But the major issue:demand for self-protection decreases when disease prevalence is low,and may disappear completely at very low levels Bhattacharya,Hyde and Tu-HealthEconomics Bhattacharya, Hyde and Tu – Health Economics Eradicating a disease  Why is it so hard?  There are obvious technical challenges ◼ Hard to find and eliminate disease in all non-human reservoirs ◼ Hard to access remote, undeveloped regions where the last cases of a disease reside  But the major issue: demand for self-protection decreases when disease prevalence is low, and may disappear completely at very low levels