Blood donations are 'gifts' that do not fit easily into a more market-
oriented health care system. The new commercial organisational arrange
ments in New Zealand for the collection, manufacture and distribution
of blood and blood products are compared in this paper with the old or
ganisational arrangements. The particular case of screening blood for
hepatitis C is examined. A socio-legal framework, which looks at the r
egulation of social institutions, is used to explore the different way
s in which people have tried to maintain the quality of blood and bloo
d products, both in New Zealand and internationally. One conclusion dr
awn is that blood production and distribution cannot be commercialised
without affecting supply and quality.