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# Chad - Geographical disease risk index

Malaria

  Risk Category A

  Risk Category explanation

  A: countries where the malarial risk is present in the whole country all year or with very clear seasonal guidance.

  B: countries where only parts of the country are affected.

  C: countries where malaria is limited to discrete pockets, where the risk of infection is low, or where there are few visitors to affected areas. It is likely that tourists who visit these countries will be able to donate but individual assessment must be applied. Donors are likely to have detailed knowledge if they have visited any malarial areas. The healthcare professional should establish whether the donor sought advice prior to travel and if they were advised to take antimalarial precautions.

  All year in whole country.

  Search for Malaria guidance

Trypanosoma Cruzi

  No Risk

West Nile Virus

  No Risk

Viral haemorrhagic fever

  No Risk

Tropical viruses

  Risk

  - Chikungunya Virus
  - Dengue Virus
  - Yellow Fever Virus

  Risk applies all year in whole country.

  Search for Tropical virus guidance

Reason for change:
  Clarification of all-year risk for tropical viruses
Version:
  Introduction of seasonal risk for Tropical Viruses
Version details:

  GDRI Edition 002 Release 54 (19 January 2026)

BETA

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