Celixoy.de @celixoy - Tumblr Blog

The cytotoxic (killing) function of T cells is central to their activity in immune defence — for example in eliminating infected or cancerous cells — but it was not until 1970 that cytotoxic activity was attributed to thymus-derived lymphocytes (T cells). Until the mid-1950s, immunology research was focussed largely on the humoral arm of the immune system mediated by antibodies.