With the nationwide campaign #missingtype - only when it's missing, it's noticed, the blood donation services of the German Red Cross (DRK) and the Bavarian Red Cross (BRK) draw attention to the urgent need for blood donations on World Blood Donor Day on June 14 with broad support. In order to attract more people to donate blood, many organizations, companies and public figures are refraining from using the letters A, B and O in their social media posts during the week beginning June 14 - representing the frequently needed blood groups A, B and zero.