National rules for export often limit or place conditions on export of blood and blood components, e.g. only in situations of emergency, which is seen by many countries as part of their national policy to ensure self-sufficiency (see below).
Kansalliset vientisäännöt usein rajoittavat veren ja sen komponenttien vientiä tai asettavat sille ehtoja (esimerkiksi vienti vain hätätilanteissa).