it's outsourcing by choice rather than necessity. Europe can grow its own blood. The much more permissive laws in the U.S. which cause an oversupply for local usage mean it's cheaper to import it. During periods of high demand that exceed current supplies, countries are typically able to increase donations substantially to cover the shortfall, and long term, could pursue similar laws to the U.S. There is no prospect of blood being a meaningful bargaining chip in a trade war.