The main causes leading to deferrals of candidate donors reported by Member States were low haemoglobin levels (putting at risk the health of the donor) as well as risk of transmission of infectious diseases, (sexual) risk behaviours, travel, medication and other medical reasons (putting the health of the recipient at risk).
Liikmesriikide teatel olid peamised doonorikandidaatidele loovutuskeelu määramise põhjused vere väike hemoglobiinisisaldus (mis seab ohtu doonori tervise), nakkushaiguste ülekande risk, (seksuaalne) riskikäitumine, reisimine, ravimid ja muud meditsiinilised põhjused (mis seavad ohtu retsipiendi tervise).