Pall launches Leukotrap Affinity Plus Prion and Leukocyte Reduction Filter System (News-Medical-Net) Pall Corporation, a global leader in filtration, separation and purification, today announced the launch of the Leukotrap® Affinity Plus Prion and Leukocyte Reduction Filter System. The new blood filter reduces prions and leukocytes in a single step. [News Source]