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Look Up the WHO Region for ISO3 Codes

Source: R/iso3_to_region.R
iso3_to_region.Rd

Maps ISO 3166-1 alpha-3 country codes to WHO region codes using the who_countries dataset shipped with DSIR. Stays in sync with WHO governance changes reflected in DSIR — for example, Indonesia's reassignment from SEAR to WPR following EB156 (May 2025).

Usage 

iso3_to_region(iso3, long = FALSE)

Arguments

iso3

Character vector of ISO3 codes. Case-sensitive (uppercase, as in who_countries).

long

Logical. If TRUE, return long-form region names (e.g. "Western Pacific"). If FALSE (default), return the short codes used elsewhere in DSIR: "AFR", "AMR", "SEAR", "EUR", "EMR", "WPR".

Value

A character vector the same length as iso3.

Details

Codes that do not correspond to a WHO Member State return NA. This includes Associate Members (Puerto Rico, Tokelau) and other non-Member areas that some indicator data sets cover.

See also

who_countries, wpro_cty.

Examples 

iso3_to_region(c("PHL", "FRA", "USA", "COK"))
# "WPR" "EUR" "AMR" "WPR"

iso3_to_region(c("IDN", "JPN"), long = TRUE)
# "Western Pacific" "Western Pacific"  (Indonesia in WPR since May 2025)

# Non-Member areas return NA
iso3_to_region(c("PRI", "TKL", "PHL"))
# NA NA "WPR"