Lymphocytes are a type of white blood cell produced in bone marrow that play a crucial role in your immune system. There are several types—called T cells, B cells, and natural killer (NK) cells—that ...

Monocytes are a type of white blood cell that helps fight infections in your body. A high monocyte level may indicate inflammation, infection, blood disorders, and other health issues. Along with ...

Leukemias are classified by the onset (chronic or acute) and cell types involved (myeloid cells and lymphocytes). Painless, swollen lymph nodes, especially in the neck and armpits, are possible ...

Cellular immunity is a protective immune process that involves the activation of phagocytes, antigen-sensitized cytotoxic T cells and the release of cytokines and chemokines in response to antigen ...

CD4 T helper cells are a type of white blood cell called a lymphocyte that serves an important role in your immune system. These cells help defend the body against infection by directing other "killer ...