Wiktionary
blood banks
n. (blood bank English)
Usage examples of "blood banks".
There's a series of unsolved and seemingly unconnected murders involving blood banks, back in the States and here - except that I think they may be connected.
He had carefully placed the thermal detonators in high-population areas, but well away from the blood banks and hospitals.
These days would give the blood banks time to process his blood, and to have some of their older blood discarded.