Scientists find new white blood cell for immunology

Two white blood cells known as Th1 and Th2 have long been recognized for their powerful role in directing immune cells to fight infections and some cancers. Now, though, scientists have identified a third white blood cell that works in tandem with Th1 and Th2, and the discovery is promising to shake up research projects for rheumatoid arthritis, multiple sclerosis and inflammatory bowel disease.

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