Antigen-presenting cells are usually:

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Antigen-presenting cells (APCs) are cells that present antigens to T cells in order to activate an immune response. Macrophages are one type of APC that are specialized cells of the immune system that engulf and digest pathogens and present their antigens to T cells. B cells also have APC activity, but their main function is to produce antibodies. Neutrophils are not considered APCs, and natural killer cells do not present antigens to T cells.

Antigen-Presenting Cells Are Usually