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)