Scientists have discovered that a type of white blood cell exists as a single large population of cells that move throughout the body looking for, and repairing, damaged tissue | Discovery of ‘new rul ( www.cam.ac.uk )

From the article: This overturns the traditional thinking that regulatory T cells exist as multiple specialist populations that are restricted to specific parts of the body. The finding has implications for the treatment of many different diseases – because almost all diseases and injuries trigger the body’s immune system....