People donate blood in Vientiane, Laos, June 14, 2018, the World Blood Donor Day. This year's theme is "Be there for someone else. Give blood. Share life." (Xinhua/Liu Ailun)

People donate blood in Vientiane, Laos, June 14, 2018, the World Blood Donor Day. This year's theme is "Be there for someone else. Give blood. Share life." (Xinhua/Liu Ailun)

People donate blood in Vientiane, Laos, June 14, 2018, the World Blood Donor Day. This year's theme is "Be there for someone else. Give blood. Share life." (Xinhua/Liu Ailun)

People donate blood in Vientiane, Laos, June 14, 2018, the World Blood Donor Day. This year's theme is "Be there for someone else. Give blood. Share life." (Xinhua/Liu Ailun)

People donate blood in Vientiane, Laos, June 14, 2018, the World Blood Donor Day. This year's theme is "Be there for someone else. Give blood. Share life." (Xinhua/Liu Ailun)

People donate blood in Vientiane, Laos, June 14, 2018, the World Blood Donor Day. This year's theme is "Be there for someone else. Give blood. Share life." (Xinhua/Liu Ailun)