A man donates blood in Nairobi, Kenya, June 14, 2021. Monday marks the World Blood Donor Day. (Photo: Xinhua/Zhang Yu)

Staff members arrange bags of donated blood in Nairobi, Kenya, June 14, 2021. Monday marks the (Photo: Xinhua/Zhang Yu)

People donate blood in Nairobi, Kenya, June 14, 2021. Monday marks the World Blood Donor Day. (Photo: Xinhua/Zhang Yu)