Twenty years ago, Tran Hoang Long of HCM City discovered that his blood type was B-negative, shared by less than five per cent of the world’s population.

Since that time, the 48-year-old motorbike taxi driver has been donating his blood regularly as one of the members of the Club for People with Rare Blood Types in the southeastern region.

People with B-negative blood can donate blood to patients with B positive, AB positive, AB negative and B negative blood types.

Cho Ray Hospital in Ho Chi Minh City set up the club in 2010.

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