Tattoos Do Odd Things to the Immune System
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In 2018, I paid a man a couple hundred dollars to repeatedly jam several needles into the skin of my right wrist. I felt as if I were being attacked by a microscopic cavalry of crabs. Into every jab went black ink, eventually forming the shape of double quotation marks. It was my first tattoo, and likely not my last.
In the that tattoos have been around, not much has changed. The practice still involves carving wounds into permanent, inked-in shapes that we find aesthetically pleasing. But much of tattooing remains mysterious: Scientists still aren’t sure what makes certain tattoos fade fast, why others stick around when they’re , or how they . One of the strangest and least-studied enigmas, though, is how tattoos survive at all. Our immune system is constantly doing its darndest to destroy them—and understanding why it fails could clue us in to one of our bodies’ most important functions,
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