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#' Retrieve Flu Season Data from the United States Centers for Disease Control and Prevention ('CDC') 'FluView' Portal
#'
#' The U.S. Centers for Disease Control (CDC) maintains a portal
#' <http://gis.cdc.gov/grasp/fluview/fluportaldashboard.html> for
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#' accessing state, regional and national influenza statistics as well as
#' Mortality Surveillance Data. The Flash interface makes it difficult and
#' time-consuming to select and retrieve influenza data. This package
#' provides functions to access the data provided by the portal's underlying API.
#'
#' @md
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#' @name cdcfluview
#' @docType package
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#' @author Bob Rudis (bob@@rud.is)
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#' @import httr MMWRweek xml2 units
#' @importFrom purrr map map_df map_chr map_lgl discard keep
#' @importFrom readr read_csv type_convert
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#' @importFrom tools file_path_sans_ext
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#' @importFrom tibble tibble
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#' @importFrom dplyr left_join bind_rows mutate filter data_frame %>% arrange
#' @importFrom jsonlite fromJSON
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#' @importFrom stats setNames
#' @importFrom sf st_read
#' @importFrom utils read.csv unzip URLencode globalVariables
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