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# United States of America (USA) - Geographical disease risk index

Malaria

  No Risk

Trypanosoma Cruzi

  No Risk

West Nile Virus

  Risk

  All regions of the USA except Hawaii and Alaska.

  Donors who have visited between 1 May and 30 November must have the WNV guideline applied.

  Search for West Nile Virus guidance

Viral haemorrhagic fever

  No Risk

Tropical viruses

  Risk

  - Dengue Virus

  Risk applies all year in Hawaii only.

  Search for Tropical virus guidance

Reason for change:
  Entry updated to separate guidance into a new ‘United States Virgin Islands (USVI)’ entry.
Version details:

  GDRI Edition 002 Release 56 (1 May 2026)

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