Natural killers in Our Body: Immune system in 3D

Of all the #immune system soldiers, natural #killer #cells are the most aggressive. They are lymphocytes with no immunological memory, and are part of your innate immune system. Natural killer cells make up about five to 15% of the total circulating lymphocyte population. Natural killer cells are called natural killers, because they do not need to recognize a specific antigen before releasing their toxins and destroying a viral infected cell, or cancer cell. They target tumor cells and protect a...