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Earth scientists today explain the origins of California
Memory Cells
B or T cells (lymphocytes) that permit rapid mobilization of the immune response on second or subsequent exposure to a particular antigen. See memory B cells and memory T cells.
Dendritic Cells
Immune cells that process antigen material and present it on their surface to other cells of the immune system, playing a critical role in triggering adaptive immunity.
Natural Killer Cells
A type of lymphocyte (white blood cell) that plays a major role in the rejection of tumors and cells infected by viruses.
Interferons
A group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, or tumor cells.
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