In Hanoi, activities will include honouring 100 outstanding donors and holding discussions from June 12-14. World Blood Donor Day is also an occasion to remember Austrian-American Karl Lansteiner, who discovered blood groups and made blood transfusions possible. In the northern province of Phu Tho, programmes “The meeting of kind hearts” and “Vietnam’s kind hearts return to the cradle of the nation” will be held in Viet Tri city on June 12 and 13, respectively. Vietnam has organised the event annually since 2007.