Scientists finally have proof of mysterious immune cell in humans

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These mysterious cells emerge in the womb.

While working to map every cell in the human body, scientists uncovered an elusive type of immune cell that first emerges 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 The Journal of Immunology . These cells arise early in mouse development, in the womb, and they produce various antibodies when activated. Some of these antibodies…

 

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