definition
strict definition
blood center
A place collecting blood, plasma, or other blood components from donors for medical or research purposes.
A blood center is a location where blood, plasma, or other blood components are collected from volunteers or paid donors for medical or research purposes.
Collection from donors is the defining activity. The collected material can be whole blood or selected components, and donors can be volunteers or receive payment.
A facility administering transfusions uses blood in treating patients. That treatment function alone is different from the donor-collection function of a blood center.