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This application is a service of the Singapore Government.

Health Sciences Authority


About Malaria

Malaria is caused by the plasmodium parasite, which attacks red blood cells. While it is usually spread by the Anopheles mosquito, it can also be transmitted through the transfusion of infected red blood cells.

Visitors to countries where malaria is endemic may be at risk of acquiring malaria.

Who Should Not Donate Blood

First-time donors with a history of malaria, as well as regular donors whose blood are tested positive for malaria, will be deferred indefinitely. Persons who have had malaria and positive for malaria antibodies may still carry a low level of parasites in their body although they have recovered and display no symptoms.

Donors who return less than 4 months from a malaria endemic area  will be deferred from blood donation and will be asked to comeback when it is  4 months or more from the day they have left the malaria endemic area.

For more information, please refer to Overseas Travel Deferral Criteria.