 The goal of the index is to provide guidance as to what measures various organizations can enact that will slow down the progression of a pandemic, easing the burden of stress upon community resources while definite solutions, like drugs and vaccines, can be brought to bear on the situation.The CDC expects adoption of the PSI will allow early co-ordinated use of community mitigation measures to affect pandemic progression.The index focuses less on how likely a disease will spread worldwide – that is, become a pandemic – and more upon how severe the epidemic actually is.