MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY
Illustration of a T-lymphocyte white blood cell (blue) destroying a malignant (cancerous) cell (pink). T-lymphocytes, or T-cells, are a type of white blood cell and a component of the body's immune system. They recognise a specific site (antigen) on the surface of a pathogen or foreign object, bind to it, and produce antibodies or cells to eliminate it.
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