This function provides similar data to get_weekly_flu_report but
provides more metadata about the reporting sources and has access to more
historical infomation.
a vector of years to retrieve data for (i.e. 2014 for CDC
flu season 2014-2015). Default value is the current year and all
years values should be >= 2008
Value
A data.frame of state-level data for the specified seasons
(also classed as cdcstatedata)