Answer: White Blood cells
Explanation: Lymphocytes are the type of white blood cell that help protect your body from harmful bacteria and infection. White Blood cells are a vital part of your lymphatic system. There are two main kinds of Lymphocytes. T cells and B cells.
B cells: These cells produce antibodies. Antibody's will attach themselves to an antigen making it easier for immune cells to destroy.
T cells: These cells ATTACK antigens. They also release a chemical known as Cytokines. This helps control the entire immune response.