NYU Langone Health / NYU Grossman School of Medicine Apr 15 2025 The immune system must be able to quickly attack invaders like viruses, while also ignoring harmless stimuli, or allergies can result. Immune cells are known to ignore or "tolerate" molecules found on the body's own healthy cells, for instance, as well as nonthreatening substances from outside the body like food. How the system achieves the latter has been unclear.  Now, a new study led by researchers at NYU Langone Health has