Scientists finally have evidence of a mysterious immune cell in humans

While working on mapping each cell in a file human body Scientists have discovered an elusive type of immune cell that first appears in the womb. The existence of such cells in humans has been hotly debated – until now.

These mysterious cells, known as B-1 cells, were first discovered in mice in the 1980s, according to a 2018 review in Journal of Immunology. These cells appear early in mouse development, in the womb, and produce different types Antibodies when activated. Some of these antibodies stick to mouse cells and help remove dead and dying cells from the body. Activated B-1 cells also make antibodies that act as the first line of defense against pathogens, such as viruses and viruses. bacteria.

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