MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY
T cell attacking cancer cell. Computer illustration of a T lymphocyte white blood cell (left) destroying a cancerous cell (right). 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 on the surface of a pathogen or foreign object (antigen), bind to it, and produce antibodies or cells to eliminate it.
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