Definitions for "Transfer factor"
a substance produced by white blood cells that transfers the ability to recognize foreign invaders from cell to cell.
A fraction of white blood cells that apparently "transfers" capability to mount an immune response to a specific antigen.
(TRANS-fer FAK-ter) A substance made by some white blood cells. Transfer factor from one person's white blood cells may be able to cause a specific immune response when injected into the skin of another person.