The<unk>  (PSI) was a proposed classification scale for reporting the<unk>  of influenza<unk> s in the United States. The PSI was accompanied by a set of guidelines intended to help communicate appropriate actions for communities to follow in potential<unk>  situations. Released by the United States Department of Health and Human Services (HHS) on February 1, 2007, the PSI was designed to resemble the Saffir-Simpson Hurricane Scale classification scheme. The<unk>  was replaced by the<unk><unk>  Assessment Framework in 2014, which uses quadrants based on transmissibility and clinical<unk>  rather than a linear scale.
Pandemic severity index
Test panel
Epidemic curve
Fractional kill
Global Influenza Surveillance and Response System
Apparent infection rate
Case fatality rate
Early warning score