B cells and T cells are also known as lymphocytes, they are a type of white blood cell in the immune system. These cells are important for ‘policing’ the human body for foreign invaders.

In particular, B cells produce antibodies and help to activate the rest of the immune system to destroy any foreign invaders. The main difference between T cells and B cells is that T cells mainly recognise things that have infected cells, such as viruses whereas B cells can recognize foreign invaders circulating around the body.

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