Methods
We used reported weekly confirmed influenza in Allegheny County during
the 2007, and 2010-2015 influenza seasons using Pennsylvania’s Allegheny
County Health Department all-age influenza cases from health facilities,
and all-cause and influenza-like illness (ILI)-specific absences from
nine county school districts. Negative binomial regression predicted
influenza cases using all-cause and illness-specific absence rates,
calendar week, average weekly temperature and relative humidity, using
four cross-validations.